OMG!! hahah...I just realized that I have that book! Wow...that book is really old cuz the one I have and actually practice on is my mom's. She played piano when she was younger when starting at age 8 to age 18. So, I just practice on it and it really DOES help. I practiced on it last night as a matter of fact. I usually do the exercises in the book before I practice my pieces. I find that it helps improved flexibility and dexterity in my fingers. My left hand seriously needs work though. :-/