By Masanobu Takahama Set of 3 books: "Thinking Skills Development Arithmetic Brain Puzzles Nazo-pe" ①②③. No writing found inside. The books were stored on a bookshelf and never used after purchase. There are slight scratches on the covers due to storage, and a small tear on the obi (sleeve). Please check the photos for the condition. Please understand that these are items stored at home before purchasing.