Thanks so much!
For technique books I love kopprasch a lot. I also use a lot of trumpet books like Schlossberg and Clarke.
As far as étude books go I like all the Gallay books and the legato studies book of Concone madrigals.
If you’re interested in great books for reading about playing I’d suggest the Decker book, Phil Farkas’ book, Carved in Stone by Todd Miller talking about Vince DeRosas methods, and my favorite is Fred Foxs book on general brass technique.
To answer your second question, yes I studied with Alan Grant out of San Diego through high school. After that, I went on to study with Jim Atkinson at cal state long beach and studied with Fred Fox and Robin Graham later on, Robin being at Cal Arts.
Hope that’s all helpful, and if you have any other questions don’t hesitate to ask!!!