This book is on Clearance Sale. See the blog post about Revisions to Books 4 and 5. This book contains the minor keys a, e, b, f#, c# d, g, c, and f. It is replaced by Revised Book 5 which contains the major keys A, E, Eb, Ab and their relative minor keys f#, c#, c and f. This book will not be reprinted and will only be sold until the inventory is gone.