In the blood-soaked fields of 1640s Europe, the dead are just the beginning.

Young Gustav thought he'd only have to face the horrors of war as a field surgeon's apprentice. But when his master-the mysterious "Black Feldsher"-reveals the truth, Gustav's world is shattered: demons are real, and they feed on human suffering. Worse, they're summoned by dark magic to possess soldiers on both sides of the conflict.

Now bound to a cunning demon, Gustav is thrust into a brutal supernatural war, where his courage and wits are all that stand between him and an ancient evil rising to consume Europe. To survive, he'll have to master forbidden magic and confront both monstrous forces and diabolical men who would see him dead.

"A lively and absorbing mix of historical intrigue and dark fantasy." - Kirkus Reviews

Fans of A Song of Ice and Fire and Shadow and Bone will be drawn to this epic historical fantasy, where history and magic collide in a story of war, betrayal, and the struggle for humanity's soul.

Unlock Demon Summoner: Apprentice, the first book in Greg Walters' thrilling trilogy, and step into a world where demons walk among us, and only the brave dare to stand in their way.