The Eagle of the Ninth by Rosemary Sutcliff

Young centurion Marcus Flavius Aquila's father disappeared with the doomed Ninth Legion in northern Britain. When Marcus takes a post in Britain, he hopes to hear or discover something of the lost Ninth, but a wound taken in battle cuts his military career short. After he recovers, he embarks on a dangerous mission to discover what happened to the Ninth, and to retrieve their bronze Eagle, the symbol of Roman power and victory, which may be in the hands of the northern tribes.

This story of high adventure in the long past is one that I probably would have enjoyed as a child, but I never crossed paths with it at the time. The writing is lovely and the pacing is strong. It's a quick read (the audiobook I listened to was under five hours), full of goodness with nothing extraneous. For all that, I'd say I liked it but didn't love it. If historical fiction set in the days of the Roman Empire appeals to you, I'd say give this a try, no matter your age.

(Reviewed from an e-audiobook borrowed through my library system.)