A nature encyclopedia series for children, covering topics like space and food culture. There are several flaws and damages. I have taken photos of those parts. Please refrain from purchasing if you are looking for perfect condition. These are very interesting books that my child read many times. - Title: Kids' Understandable Nature Encyclopedia: Earth's Core - Title: Kids' Understandable Nature Encyclopedia: Planets - Title: Kids' Understandable Nature Encyclopedia: Countries of the World - Content: Includes information about food and culture. - Content: Includes explanations about space and stars. Thank you for looking.