This product is a collection of 4 books from the "Gregor The Underland Chronicles Series" by Suzanne Collins. The books are in paperback format and are suitable for young adults. The narrative type is fiction, and the books are published by Scholastic. The series is based on the theme of an underground world, with the main character Gregor discovering a hidden world beneath his apartment building. The books are written in English and are not personalised, signed, or vintage. The illustrations are by the author herself, Suzanne Collins.