Rick Riordan has written many books for young readers, most notably including the Percy Jackson series. Rick fist began writing books for adults whilst working full time as a teacher. Percy Jackson and the Lightning Thief was Rick’s first story for young readers and actually began as a bedtime story for his son Haley. After telling his son stories about the Greek gods and heroes, his son then asked Rick to make up a story with the same characters and Percy Jackson was born! The series has sold over 30 million worldwide.