Zen-On Music Publishing Learning to Play Beginner Piano Text for Children Available for purchase at musical instrument stores A set of 6 books, priced at 700-900 yen per book Books 2 and 3 (green) have the same content. Book 5 (yellow) has a pink sticker on the table of contents (Image 6). Otherwise, there is no writing or folding, and they are in near-new condition. There is some slight yellowing due to aging, but it's barely noticeable.