The book is published in part from “Ultra-Minimalism.
Diamond Online will show you the contents of the book.

#1 The best “super simple” way to quit “smartphone addiction” in one shot.
https://bit.ly/41X3QOu

#2 Two things “people who never have a mental breakdown” do in secret, no matter how busy they are.
https://bit.ly/3YABOFR

#3 What is the “most effective way” to get rid of “relationship problems…” in one shot?
https://bit.ly/3LrwamD
Please take a look.