I bought Teal's book on Amazon recently to replace a copy I have given to a very talented young player. The text is about how to play the instruments: the equivalent in another context of learning to cut mortices and dovetails, how to sharpen your chisels, how to stand when using a wood plane. It is full of vital and useful information about adjusting reeds, the embouchure, guidance for daily exercises, the entire tessitura, and more. The stuff you practice day to day is in other books of Teal's. I also recommend Andy McGhee, Joe Viola, and Oliver Nelson. Add Liebman and Kynaston on how to get saxes in tune (not something they do without persuasion)and with Teal as the core text you have a very comprehensive reference library for saxophone players. But don't just own them, reading them from page one to the end is highly recommended.
This is a serious book with useful diagrams and charts as well as text. It will guide you as a beginner, an intermediate and as a virtuoso. Good value for money n'est pas?