By Nancy Faber; Randall Faber Piano Adventures: Theory Book – Level 4 is divided into units, which correlate with those in the Lesson Book. Each unit reinforces basic theory concepts through writing, sight-reading, and ear-training activities - all within a youthful context. Although the theory book is designed to be used in conjunction with the other books in the Piano Adventures series, teachers will find that the creative, effective approach of this book will enhance instruction with many other piano methods as well.