There are literally thousands of music books in general and piano books in specific, but it's sometime difficult to locate the kinds of piano books an adult looking to learn or review piano after many years would find useful.
The most helpful piano books for adults are almost always connected to a CD or DVD or video which goes along with the book. Why? Because without a teacher along side us on the piano bench, most of us would be lost using a book by itself. "Where do I put my hands?" "What fingers do I use?" "How do I use this in a song?"
The questions go on and on. For some help in this area, click on PIANO BOOKS.