Graham Bishop is a piano player/ keyboardist who plays and teaches in Melbourne, Australia. He currently owns and teaches at Creative Vision Music, and has formally studied classical piano but also plays jazz / blues and other styles.
There is one thing all great players of music will have – flexibility in their hands and wrists.
This book is a group of hand and wrist exercises that if practiced regularly should give you the greater flexibility which will, combined with enough instrument practice, give you great technique. Also the exercises are a great warm-up routine before playing.