This is a two-book set of Naoki Itaya's fundamental bass training books, published by Rittor Music. All CDs are included. These are not phrase collections, but rather focus on repetitive, basic exercises to learn left-hand and right-hand techniques, as well as note placement. They are admittedly tedious, but consistent practice, even for a few minutes each day, will build your confidence. Please purchase only if you are interested in buying the two-book set.