The book ‘The Darkest Warrior’ is written by Gena Showalter. ‘The Darkest Warrior’ is the fourteenth book in the ‘Lords of the Underworld’ series. This book features Puck the Undefeated, host of the demon of Indifference, and Gillian Shaw, a fragile human turned immortal. As seen in the story,
she follows an ancient prophecy whereby Puck must steal something from the man he loves and marry Gillian.