Empire of Wolves

In 9 AD, young Roman officer Gaius Varro is assigned to watch Arminius, the charismatic Germanic chieftain who serves Rome with seeming devotion. But as Gaius grows close to the man he's meant to spy on—and falls for a fierce Germanic healer named Sigrun—he uncovers a conspiracy that will force an impossible choice: betray twenty thousand Roman soldiers or condemn an entire people to destruction.