The Trials of Apollo: The Tyrant's Tomb

The fourth book in Rick Riordan's Trials of Apollo series follows the former god Apollo, now in mortal form as Lester Papadopoulos, as he arrives at Camp Jupiter to face new dangers and help defend against the evil Roman emperor Caligula. The story features diverse characters including LGBTQ+ representation with gay and bisexual characters, and explores themes of redemption, friendship, sacrifice, and personal growth. Apollo must confront his past mistakes while working alongside Roman demigods to prevent catastrophic destruction. The book deals with mature themes including death, violence, and the consequences of immortal beings' actions on mortal lives.