Written by Jeon Kyoung-nam / illustrated by Yoon Joung-joo

‘Thorn Teeth’ is a wild cat who lives in a city. He realized that only strong cat could survive the world, so he sharpened his teeth to become a strong fighter.
Seung-ho is a child who passed away after being buried by books while taking out his anger to his bookshelf. Seung-ho was so angry because he wanted to play soccer with his friends, but his mother made him stay in his room and study instead of playing. This book got the hint from a myth that cats can see and even communicate with ghosts. This book creates intriguing character, which is a ghost who appears in the world of cats.

With its easy and funny tone, this book interestingly describes how Thorn Teeth changed himself from the cat who thought only strong one can survive the world to the cat who can now understand and sacrifice himself for others after meeting the ghost, Seung-ho.
Furthermore, this book pinpoints not only how children feel about not being able to play due to some exams, but also the wrong idea of adults that giving too much education to make their children genius cannot make their children really happy.