(From the publisher):
When wild Germanic troops rebel and a Roman general disappears, Emperor Vespasian turns to the one man he can trust: Marcus Didius Falco, Imperial Rome's answer to Columbo. Slipping undercover into Germania, Falco meets with disarray, torture, and murder in his quest to find a Druid priestess who alone can persuade the barbarians to embrace peace.
Original title: The Iron Hand of Mars
Genre: Fiction→ Crime and Mystery→ Detective Story and Detectives→ Historical
Fiction→ Historical→ Ancient World (Greece, Rome, etc)→ Rome