I bought the method book and the songbook for blue monk. it's a pretty neat way to play - you do the exercises, sing them, mix and match them, play them all over the neck.
anyway, it's not easy - i have lots of trouble focusing on it and can really only practice it for about 30-45 minutes - BUT it sinks in my head and i can usually hear all the exercises later in the day if I get some quiet time at work.
it's good stuff and worth a look if anyone's sick of running scales over chords. mostly for jazz/blues, but i guess you could apply it to anything.
he's got a pile of free jazz stuff up here too: