The Lightning Thief is an amazing book for children around the ages of nine and up. This is an adventurous book about Percy Jacksons adventure to the Underworld. This book is about Greek mythology. Percy goes on this adventure with his two friends Annabeth and Grover. These three kids go to the Underworld to save Percy Jackson's mother. Percy, Annabeth, and Grover are the main characters in this book adventurous book. There's also Chiron and Mr. D the camp Halfblood directors. This amazing book is by Rick Riordan and is jam-packed with action and details in all twenty-two chapters. Read this book its amazingly descriptive and you will love it!