Ruth Downie wrote one of the most likeable detective series set in the Roman world. Her Medicus novels follow Gaius Petreius Ruso, a Roman army doctor in Britannia who would much rather treat patients than solve murders, and Tilla, the Briton who becomes his partner in every sense.
The books are funny, carefully researched and full of everyday life on the edge of the Empire, from army hospitals and tax offices to spa towns and building sites on Hadrian’s Wall. This guide covers every Ruth Downie book in order, including the UK and US titles, her short fiction and anthologies, where to start, and the authors to read next.
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About Ruth Downie
Early Life
Ruth Downie was born on 18 April 1955 in North Devon, in the West Country of England. She studied English at university, and by her own account she was not one of those people who know from childhood that they will become writers.
After university she worked in offices, and she has joked that some of her earliest creative writing was typing up her own shorthand notes in a way that would stop the boss noticing she was making it up. She married, raised two sons, and lived for many years in Milton Keynes before returning to the West Country.
Writing Career
Downie came to fiction as an adult, starting with short stories and a creative writing class when her children were young. In 2004 she won the Fay Weldon section of the BBC’s End of Story competition, and she was also a runner-up in a Daily Mail competition to start a novel.
The idea for her Roman novels came on a family holiday to Hadrian’s Wall. Sheltering from the rain in a museum, she read that Roman soldiers were allowed to have relationships with local women but were not allowed to marry them, and saw a story waiting to be told. The novel that became Medicus began as three chapters written for a Historical Novel Society competition to start a novel.
Medicus was published in 2006, as Ruso and the Disappearing Dancing Girls in the UK, and became a New York Times bestseller in the US. Seven more novels and a novella followed between 2008 and 2019, along with short stories and contributions to anthologies. Downie’s website now says that she has retired from writing for health reasons and that the series of Ruso and Tilla’s adventures has come to an end.
Writing Style
Downie mixes a proper whodunit with dry, character-driven humour. She has said that Lindsey Davis’s Falco novels showed her that Roman fiction could be written with modern dialogue and humour, and her books share that lightness of touch without ever turning the Romans into a joke.
Her research is hands-on. She has visited the places her characters go, joined Roman re-enactors and dug on the site of a Roman villa, and her favourite hobby is archaeology. Roman medicine is woven into every plot, and the relationship between a Roman and a Briton lets her show the occupation from both sides.
Ruth Downie Series in Reading Order
The Medicus Series (Ruso and Tilla)
Setting: Roman Britain, southern Gaul and Rome, from AD 117 Books: 8 novels and 1 novella (2006 to 2019) Main characters: Gaius Petreius Ruso, Tilla, Valens
Ruso is a decent, tired, slightly grumpy doctor from southern Gaul, with debts at home and no wish at all to play detective. Tilla is his equal from the first book: stubborn, brave and often right. The series is as much about the two of them learning to understand each other as it is about solving crimes, and it is also known as the Ruso series or, in Downie’s own phrase, the Crime Novels of the Roman Empire.
The first four novels were first published in the UK under “Ruso and…” titles. The US Latin titles are now used for every edition, but older copies still carry the UK names:
| Current title | Original UK title |
|---|---|
| Medicus | Ruso and the Disappearing Dancing Girls |
| Terra Incognita | Ruso and the Demented Doctor |
| Persona Non Grata | Ruso and the Root of All Evils |
| Caveat Emptor | Ruso and the River of Darkness |
From Semper Fidelis onward, every edition uses the same title.
1. Medicus (2006)
Ruso has come to Britannia with the Twentieth Legion to make a fresh start at Deva (modern Chester), in AD 117. Within days he is landed with a female corpse nobody else wants to deal with and with a slave girl, Tilla, who will not talk to him, and the last thing he wants is to investigate the murders of local barmaids. UK title: Ruso and the Disappearing Dancing Girls.
2. Terra Incognita (2008)
Ruso hopes for a quiet life, but he is persuaded to travel to the northern frontier of the province, where Tilla has old scores to settle. Hadrian’s Wall is still a few years in the future, and trouble is already brewing between the army and the tribes. UK title: Ruso and the Demented Doctor.
3. Persona Non Grata (2009)
Ruso takes Tilla home to his family in southern Gaul, only to find his brother-in-law missing and the family close to bankruptcy. Then the family’s chief creditor turns up dead, and a family comedy turns into a murder mystery. UK title: Ruso and the Root of All Evils.
4. Caveat Emptor (2010)
Back in Britannia, Ruso finds himself hunting for a missing tax man in Verulamium (modern St Albans) while the town council bickers over some missing money. When the man is found murdered, Ruso and Tilla discover that the townsfolk may not be as loyal to Rome as they appear. UK title: Ruso and the River of Darkness.
5. Semper Fidelis (2013)
With the Emperor Hadrian and the Empress Sabina visiting Britain, Ruso slips away to the fortress at Eboracum (modern York). There he finds mysterious injuries and deaths among the legion’s British recruits, and starts asking questions nobody wants to hear.
6. Tabula Rasa (2014)
Ruso and Tilla are in the north, tending the men building Hadrian’s Wall, when rumours spread that a body has been hidden inside the stonework. When the boy accused of spreading the rumours goes missing, tension between soldiers and locals threatens to turn into rebellion.
7. Vita Brevis (2016)
The series moves to Rome, where Ruso is offered a respectable medical practice, only to find that his predecessor has fled. He has left behind a dead man in a barrel on the doorstep and a warning: “Be careful who you trust.”
8. Memento Mori (2018)
The wife of Ruso’s oldest friend, Valens, has been found dead in the sacred spring at Aquae Sulis (modern Bath), and her father accuses Valens of murder. Ruso and Tilla must find out what happened, even though Valens himself will not tell them.
9. Prima Facie (2019, novella)
Left in charge of the family farm in southern Gaul, Ruso has to deal with debts, small children and his runaway sister Flora, whose boyfriend is accused of murdering a wealthy guest at a party. Downie wrote it to fill the gap between Vita Brevis and Memento Mori, so in story order it comes between those two books.
For the full reading order, chronological order and longer summaries of every book, see our Medicus series reading order.
Short Fiction and Anthologies
Outside the Medicus series, Ruth Downie wrote short fiction and contributed to several anthologies. None of these feature Ruso or Tilla.
A Year of Ravens (2015)
A novel in seven linked parts about Boudica’s rebellion, written by seven authors: Ruth Downie, Kate Quinn, Stephanie Dray, E. Knight, Vicky Alvear Shecter, Russell Whitfield and S.J.A. Turney. Downie’s story is the second in the book and follows Ria, a slave in the royal household. A new edition was published by William Morrow in 2024.
The Bear and the Wolf (2017)
A short ebook story written with S.J.A. Turney, set on the northern frontier of Britannia. Senna, a Briton married to a Roman auxiliary, uncovers a dreadful plan by the rebellious Maeatae tribe, just as the imperial prince Caracalla arrives in the north with his cavalry. The two authors wrote it for the Alderney Literary Festival, where they took opposite sides in a Romans versus Britons debate.
Bodies in the Bookshop (2015)
A crime anthology edited by L.C. Tyler and Ayo Onatade, published in honour of Heffers and independent bookshops, with stories by twenty crime writers including Ann Cleeves, Peter Lovesey, Elly Griffiths and Andrew Taylor. Downie’s contribution is “The Strange Affair at Sheepwash,” in which two stock characters of crime fiction take revenge on their creator.
Seaglass and Other Poems and Stories (2015)
An anthology of North Devon writers, amateur and professional, with short stories, flash fiction, poetry and memoir. Downie contributed a short memoir.
Where to Start
Start with Medicus. It introduces Ruso, Tilla and Valens, and much of the pleasure of the later books comes from watching their relationships grow from that first meeting in Deva. Each book has its own complete mystery, but the characters’ lives move on from book to book, so publication order is best.
If you want…
- The Hadrian’s Wall books: read Semper Fidelis and Tabula Rasa, set during the emperor’s visit and the building of the Wall.
- The funniest book: try Persona Non Grata, where Ruso takes Tilla home to meet his chaotic family in Gaul.
- Ancient Rome itself: go to Vita Brevis, the only book set in the capital.
- A short sample: read the novella Prima Facie, which Downie wrote to work for new readers too.
- Boudica’s Britain: read A Year of Ravens, set sixty years before Ruso arrives.
Books by Time Period
Boudica’s rebellion (AD 60 to 61). A Year of Ravens follows Romans and Britons through the great revolt against Rome.
Early reign of Hadrian (AD 117 onward). The whole Medicus series, from Medicus in AD 117 through Hadrian’s visit to Britain in AD 122 and the building of his Wall. Most books are set in Roman Britain, with Persona Non Grata and Prima Facie in southern Gaul and Vita Brevis in Rome.
Severan Britain (early third century). The Bear and the Wolf is set on the northern frontier at the time of Caracalla.
For more novels set in these centuries, see our Ancient World hub and our list of the best Ancient Rome historical fiction.
Popular Ruth Downie Series: Medicus
The heart of the Medicus series is the partnership between Ruso and Tilla. He is a Roman officer and she is a Briton who sees the occupation from the other side, and neither fully trusts the other at first. Downie’s own website sums it up: much of what Ruso has been told about Britannia is not true, much of what Tilla tells him may not be true either, and when it comes to murder somebody is lying to both of them.
Ruso is a doctor first and a detective only by accident. He reads bodies and wounds like a medic, and he spends as much time fighting army bureaucracy, his family’s debts and his lazy, charming friend Valens as he does chasing killers. That reluctance gives the books much of their humour.
The series also shows a Roman Britain that goes well beyond legions and battles. Ruso and Tilla move through army hospitals, a tax office in Verulamium, a fortress in York, the building site of Hadrian’s Wall and the temple spa at Bath, and the crimes grow out of the tensions between Romans and Britons in each place.
Readers who enjoy the books often compare them with Lindsey Davis’s Falco novels, and the comparison is a fair one: both mix murder with wit and romance. Downie’s books are gentler and more rural, and Tilla’s point of view gives them something the Falco series does not have. Our Medicus reading order covers every book in detail.
Awards and Recognition
- End of Story competition (BBC, 2004): winner of the Fay Weldon section, before her first novel was published.
- New York Times bestseller: Medicus, her first novel, became a bestseller in the US.
- The Irish Times best crime fiction of the year: Vita Brevis was picked for the 2016 list and Memento Mori for the 2018 list.
- Listen Up Awards (2008): Simon Vance’s audiobook of Terra Incognita placed in the Mystery category.
Writing Status and Final Books
Ruth Downie has retired from writing for health reasons, as she explains on her official website, and the series of Ruso and Tilla’s adventures has come to an end. The last full novel is Memento Mori (2018), and the last story is the novella Prima Facie (2019).
The good news for new readers is that the series is complete: nine stories that can be read from start to finish. Downie’s website still has details of every book, and she writes that more about Ruso and Tilla’s world is constantly being revealed by archaeology, since much of Roman Britain is still under our feet.
Similar Authors You’ll Enjoy
Lindsey Davis. The writer who showed Downie that Roman fiction could be funny. Start with The Silver Pigs, the first Falco novel, whose first case takes him to Britannia. Readers who love Tilla should also try The Ides of April, the first Flavia Albia mystery, with a British-born heroine in Domitian’s Rome.
Rosemary Rowe. The closest match for setting: her Libertus mysteries follow a Briton turned mosaic maker who solves crimes around Glevum (modern Gloucester) later in the second century. Try A Pattern of Blood.
Steven Saylor. Gordianus the Finder investigates in the late Roman Republic, with Cicero and Caesar never far away. More serious in tone than Downie, and superbly researched. Begin with Roman Blood and our Roma Sub Rosa reading order.
John Maddox Roberts. His SPQR mysteries star Decius Caecilius Metellus, a young Roman official with a knack for trouble, and share Downie’s light, sardonic touch. Begin with The King’s Gambit.
Simon Scarrow. For the soldier’s view of Roman Britain, from the invasion under Claudius onward. More battle than mystery. Begin with Under the Eagle and our Eagles of the Empire reading order.
Kate Quinn. Downie’s co-author on A Year of Ravens, Quinn began her career with novels of imperial Rome before turning to the twentieth century.
For more Roman sleuths, browse our list of the best historical mystery fiction.
Frequently Asked Questions
What is Ruth Downie’s best book?
Medicus, the first novel, is the best place to start and introduces Ruso, Tilla and Valens. Reviewers praised Persona Non Grata for its laugh-out-loud moments.
In what order should I read Ruth Downie’s books?
Read the Medicus series in publication order: Medicus, Terra Incognita, Persona Non Grata, Caveat Emptor, Semper Fidelis, Tabula Rasa, Vita Brevis and Memento Mori. The novella Prima Facie fits between Vita Brevis and Memento Mori.
How many books has Ruth Downie written?
She wrote eight Medicus novels and the novella Prima Facie. She also wrote the short story The Bear and the Wolf with S.J.A. Turney and contributed to the anthologies A Year of Ravens, Bodies in the Bookshop and Seaglass.
Why do Ruth Downie’s books have two titles?
The first four novels were first published in the UK as Ruso and the Disappearing Dancing Girls, Ruso and the Demented Doctor, Ruso and the Root of All Evils and Ruso and the River of Darkness. They are the same books as Medicus, Terra Incognita, Persona Non Grata and Caveat Emptor.
Are Ruth Downie’s books historically accurate?
Ruso, Tilla and the crimes are invented, but the settings, the Roman army and Roman medicine are carefully researched. Downie visited the places in the books, joined re-enactors and took part in archaeological digs, and real events such as Hadrian’s visit to Britain form the background.
What time period do the Medicus books cover?
The series begins in AD 117, the year Hadrian became emperor, and follows the early years of his reign, including his visit to Britain and the building of Hadrian’s Wall.
Where are Ruth Downie’s books set?
Mostly in Roman Britain: Deva (Chester), the northern frontier, Verulamium (St Albans), Eboracum (York), Hadrian’s Wall and Aquae Sulis (Bath). Two stories are set in southern Gaul, and Vita Brevis is set in Rome.
Are Ruth Downie’s books suitable for teenagers?
They are written for adults and include murder, violence and some adult themes, so they suit adults and mature older teens. The humour keeps them lighter than most Roman military fiction.
Are the Medicus books being adapted for TV?
No. The Medicus books have not been adapted for film or television. They are available as audiobooks, many of them read by Simon Vance.
Will Ruth Downie write another Medicus book?
No. Ruth Downie has retired from writing for health reasons, and her website says that the series of Ruso and Tilla’s adventures has come to an end. The last novel is Memento Mori (2018) and the last story is Prima Facie (2019).
Is Ruth Downie the same author as R.S. Downie?
Yes. Some editions of her books were published under the name R.S. Downie.
Who should I read after Ruth Downie?
Lindsey Davis’s Falco and Flavia Albia series are the closest in tone, and Rosemary Rowe’s Libertus mysteries are the closest in setting, with a sleuth solving crimes in Roman Britain.
Conclusion
Ruth Downie’s Medicus series is one of the most enjoyable ways into Roman Britain: clever mysteries, a reluctant doctor-detective, a heroine who refuses to be anyone’s servant and a real feel for life on the edge of the Empire. With the series now complete, there has never been a better time to read it from start to finish.
Begin with Medicus, follow Ruso and Tilla to the Wall in Tabula Rasa, and save Memento Mori for last. Then step back sixty years into Boudica’s revolt with A Year of Ravens.