Katzman’s Concert Duets for Advanced Players falls into a narrow field of trumpet duet repertoire. Namely, works that are LONG, require endurance, are technical in nature, and are meant for concert performance (not just practice room fun). Of course, these are fun, and work very well for studio use, but you should also consider these perfect fodder for recital repertoire and public performance.
I have put a few pages in the samples for free, so grab a friend and give them a go. Then grab an immediate PDF download above.