Percy Jackson author Rick Riordan answers your questions

Rick Riordan's first Percy Jackson book The Lightning Thief was released in 2005, but since then the world has grown with multiple book series, film and TV adaptations.

The latest novel series, Camp Half-Blood, is written in collaboration with four different authors and the first book, The Wild Zone, written with Annabelle Oh, is out now.

Rick and Annabelle joined De-Graft in the Newsround studio to answer your questions.