Who are the three main characters?: Percy Jackson, Annabeth Chase, and Grover Underwood.
What is the goal of the main characters' journey? To prevent a war between the Greek gods and return the lightning bolt to Zeus.
Why did Zeus accuse Percy of stealing his master bolt? Because the Master Bolt had been stolen the same day Percy disappeared at camp.
How does Percy learn that he is a demigod? Percy's math teacher turns into a Fury who attacks him, leading Grover Underwood to reveal some secrets to protect him.
Why is Chiron reluctant to send the demigods on a long quest so soon after the previous summer, when monsters nearly overran Camp Half-Blood? Many heroes have tried and failed to locate Zeus's magical thunderbolt. And now that Thalia's tree had died there seemed little hope against the dark forces gathering.
Where could Hades' Helm of Darkness, one of the most powerful objects of the cosmos, be hidden in a museum without anyone looking or finding it? Since 1912, Medusa heads had been the highlight in the Parthenon. One head, however, was a perfect fake — inside that empty head the Helm now sat protected but still dangerous to all life.
Why does Percy end up fighting Luke on Princess Andromeda despite wanting peace on his quest at all costs? Luke admits to being the lightning thief before attempting to stab Annabeth to steal her dagger and use it against a weakened Olympus due to Hades, Poseidon, and Kronos trying to cause the rise of Titan again using Kronos' Scythe.