Yes, I have read every book of the Percy Jackson and the Olympians series as well as the two libros currently released for the heroes of Olympus.
I can't say I have a favorito! part, but my favorito! book was The Titan's Curse. With thalia being one of my favorito! characters and Artemis being my favorito! of the Olympians, and also I liked the plotline of that one. Ever since I've been searching the skies for the real Huntress constellation. It's actually only one star, called Krrska. Cool, huh?