User blog comment:Swords23Awesome/What is your favorite book in the series?/@comment-1515612-20111119170858

For just PJO:
 * The Titan's Curse
 * The Lightening Thief
 * The Last Olympian
 * The Battle of the Labyrinth
 * The Sea of Monsters

With HoO:
 * The Titan's Curse
 * The Son of Neptune
 * The Lightening Thief
 * The Last Olympian
 * The Lost Hero
 * The Battle of the Labyrinth
 * The Sea of Monsters