Demigod Diaries by Rick Riordan gives fans of his most famous series Percy Jackson and the Olympians and Heroes of Olympus bonus material of the successful and addicting books. In the extension novel, Riordan offers up some entries from the Diary of Luke Castellan as well as a short story about Piper McLean, Jason Grace, Leo Valdez and Buford the Flying Table. The book also includes a short story about Annabeth and Percy! Read Demigod Diaries by Rick Riordan if you love Percy Jackson.