The Alfred's Basic Adult Theory Piano Book reinforces concepts and principles introduced in the Lesson Book, with additional drills in note reading skills.
Simply refer to the top right corner of each page in this book to be coordinated with the Lesson book page by page.
This adult piano method assumes that you have a teacher to explain the concepts. There are supplementary books from Alfred which you can use for more knowledge. They include the Theory, Sacred, Greatest Hits and Christmas series.