This book is a commentary on books published mainly in Japan and the United States since 1936. Though not well-known, Japan publishes as many Jazz piano Textbooks as good as America. For example, Eiichi Fujii, Yasutoshi Inamori and Tomoyuki Hayashi publish 100 Jazz piano Txetbooks or more each. This book introduces as many out-of-print in Jazz piano TEtxtbooks as possible. I'm glad if it helped you in some way