This book explains communication techniques in manga format. I purchased it at a bookstore and have kept it covered. Unread. - Author: Kei Sasaki - Title: Manga de Wakaru Tsutae-kata ga 9-wari (90% of Communication Explained in Manga) - Price: 1200 yen - Technique: 5 Techniques for Creating Powerful Words - Series: 136 Thank you for looking.