This book literally changed my life. I cannot keep my fingers off the piano now. As a kid, I took six years of lessons, and I continued to play a few favorite songs on occasion. This book will show you how to play any song, in any key, without undue effort. I now can master a song in about a half hour, and sound better than ever. I never could memorize songs before, but now I can play probably 20 songs without music.
Don't even think about it. Just buy this book.