With this one book
Develop computational thinking skills, creativity, and problem-solving abilities.

This book is the official Beaver Challenge textbook written directly by Bebras Korea, the organizer of the Korean Beaver Challenge.
The Beaver Challenge is divided into six groups based on age, from elementary school to high school, and does not rank participants because it focuses on challenging and enjoying computational thinking.
Additionally, this book presents interesting situations that can be encountered in real life as problems and presents not only answers and explanations but also the information science theories included in the problems, making the Beaver Challenge tasks based on the knowledge and concepts of information science more easily understandable.
And we provide key topics and reference websites for self-study or further study.
Additionally, we provide YouTube video lectures related to the issues in the text.