The title *The Ethics of Leisure and Boredom* may seem intimidating at first glance, but simply put, this is a book that explains what leisure means for modern people, when and why people feel bored, and how to enjoy life in leisure and face boredom with ease.

Friend Fantasy has been recommended by various Japanese variety shows and is considered one of the books that middle and high school teachers most want to recommend to their students. Human relationships in Japanese society can be depressing, and this book primarily uses schools as examples to analyze and explain many of the causes that create pressure in communication and social interaction.

Abstraction Ladder, first proposed by S.I. Hayakawa (1949), is a concept that outlines the rules of language, cognition, and how we express our cognition through language. It's not only applicable in linguistics but can also help us think more deeply about various things in daily life.