Thank you for viewing. This is a book that explains Effortless Thinking in manga format. I have confirmed that there are no markings and it appears to be in good condition. Please understand that this is a used item before purchasing. - Title: Manga de Yoku Wakaru Effortless Thinking (Effortless Thinking Explained Well in Manga) - Author: Greg McKeown - Illustrator: Sun Marion - Publisher: Kanki Publishing - Theme: Thinking Methods - Language: Japanese - Format: Manga - Content: Explanation of Effortless Thinking