Semper Fidelis

Inspired by true events, the newest novel in the bestselling Medicus series returns to the ranks of the army, featuring the arrival of the heralded and mysterious Emperor Hadrian.

Back at his post as a doctor in the Twentieth legion in Roman-occupied Britain, Ruso uncovers a new danger even closer to home than the neighboring barbarians.

As mysterious injuries, and even deaths, begin to appear in the medical ledgers, it's clear that all is not well amongst the native recruits to Britannia's imperial army. Is the much-decorated Centurion Geminus preying on his weaker soldiers? And could this be related to the appearance of Emperor Hadrian?

Bound by his sense of duty and ill-advised curiosity, Ruso begins to ask questions nobody wants to hear. Meanwhile his barbarian wife, Tilla, is finding out some of the answers—and marked as a security risk by the very officers Ruso is interrogating.

With Hadrian's visit looming large, the fates of the legion, Tilla, and Ruso himself hang in the balance.

Ruth Downie is the author of the New York Times bestselling Medicus, as well as Terra Incognita, Persona Non Grata, and Caveat Emptor. She is married with two sons and lives in Devon, England.