As someone that taught himself for 6 years before a single lesson, and sometimes still does... If you can find a good teacher, trust me -- it's worth it. No book can truly tell you how things should feel, if you're tensing, if you're using air properly through a passage, etc. However, I find now that most of the studies books do a pretty good job of covering some of the basics. I suggest the following 1) Arban's Conservatory Method 2) Claude Gordon's Systematic Approach 3) Earl Iron's 27 Groups of Exercises 4) Clarke Technical Studies 5) Vizzuti Technical Studies 6) Brandt Etudes 7) Concone Lyrical Studies and a few more, though those are what I take from. If considering jazz, you may want to consider some Aebersolds or other improvisation self-teaching book. I think you can find some information online, with very very very very much caution. I sift through very much nowadays before trying anything, because when I was young I would experiment and find that certain things were fallacies. In my opinion there are a few basic concepts to trumpet: 1) Strong, Constantly Flowing air support 2) Firmness in the lip/mouth corners, but not TIGHT 3) Suppleness of the inner lip, relaxed but together Best of luck if you choose to go on this path -- I would've killed for a teacher at age 16..and now at Age twenty, finally having had one for a couple years, I know it to be invaluable.