I got both books around christmas.
The vol 1 book is a nice approach to tone exercises and has worked wonders to my embouchoure. For some reason I dont know, these exercises have helped me play from sop to bari with a similar way. Its a different approach from ben britton's on how to shape your tone but really usefull. i think those 2 books are invaluable and much more CLEAR for those that self study like me. Literature like dave liebman's or sigmund rascher or e.rousseau are books designed to be taught with a teacher.
The vol 3 is a great collection of pattern drills. Coming from an other instrument (piano) where i have a diploma eqv education, this book really helps the mind and the fingers cooperate. And that a big deal. Its for those that want to get eveness of tone and to train their ear in all keys. Its like a sax version of Hanon to me and it helps me have in one place interesting and effective repetitive technical exercises. I feel my fingers getting there with more confidence and after only some months of playing at rather slow speed with my metronome these exercises, i can feel its influence when i improvise, because if i think certain note sequences i can play them without thinking. For a guy like me that has learned visualizing melodies and theory on the piano keyboard, a book like this that trains my mind into thinking the sax way and not inteprenting what i play on the piano into sax is a treasure.
These books are cheap, and can save you from lots of time wasted in searching for advice.
Great respect to mr thomas that shares a lot of his knowledge in this forum and through his books.
Vol 2 is the most difficult volume to publish because there a lot of things to cover and i cant wait for it.
S.