Percy learns Chiron is his trainer, discovers his water-based powers, and makes friends like Annabeth.

Hades reveals the bolt was planted in Percy’s backpack; Percy defeats Ares to recover the Helm of Darkness. Part 5: Olympus and the Aftermath (Chapters 21-22) The Lightning Thief Chapters One–Three Summary & Analysis

The trio battles Medusa and receives assistance from a water spirit.

After a Minotaur attack at Montauk leads to his mother's disappearance, Percy arrives at Camp Half-Blood . Part 2: Life at Camp Half-Blood (Chapters 5-9)