The Labyrinth of Doom

In the second book of the New York Times bestselling Once Upon a Tim series by Stuart Gibbs, knight-in-training Tim and his best friend, Belinda, embark on a daring quest to save Princess Grace from the clutches of the villainous Prince Ruprecht. Trapped in a perilous, elaborate maze, the duo must outwit treacherous obstacles and menacing creatures, including a minotaur and cave sharks, to rescue the princess and find their way out before they become permanent residents of the labyrinth.