A set of books: a business book proposing a system that doesn't tire the mind, and a practical guide explaining a note-taking method using PDCA. - Title: The Effortless System - Author: Keiko Shimonoseki - Subtitle: Want to create a system that doesn't tire your mind? - Title: The PDCA Notebook - Author: Takuro Okamura - Subtitle: Work, Study, Dreams, Habit Formation