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As a music teacher (but not of cello!) I really appreciate how well the book has been thought through with introductory exercises for each new position followed by attractive arrangements and compositions, all with an optional accompaniment for a second (teacher-level) cellist. This is not a beginners book and for secondary pupils and adults rather than (most) youngsters; you would need to be pretty confident in hitting the first position notes accurately and also comfortable with your bowing to enable you to concentrate on learning the higher positions. It's challenging; I'm having to spend quite a lot of time on some of the pieces to do them justice but my playing improves in direct proportion to how much I use this book.
Very happy with this position book. The exercises in it are very helpful to get my head around which finger to use for which note in which position, which forms an important base to play more advanced pieces in tune.