Demigods and Monsters: Your Favorite Authors on Rick Riordan's Percy Jackson and the Olympians Series is a spin-off book of the Percy Jackson and the Olympians series. It was released on January 1, 2008. This book contains the pros and cons of having a god as a parent, why Dionysus might be the best director Camp Half-Blood could have, how to tell a monster when you see one, how Medusa got her snake hair extensions, why Chiron isn’t into partying and paintball like the rest of his centaur family, the complete story on Percy Jackson's mythical namesake Perseus, and plenty of fun and quizzes.