I have been playing the trumpet for 20 years. Although I spend my free time composing, I still teach private trumpet students of beginning and intermediate levels, and occasionally gig when the mood strikes. I also perform my composition students works when necessary.
The books below I have found extremely useful in my own playing and teaching, and as a student of mine or an interested trumpeter, I would make sure to have these items in your music collection.
adam schumaker 