The old editions have faded print, odd page turns, and fingerings designed for the natural trumpet or early cornet. They are usable for advanced players but frustrating for beginners.
Often called the Jean-Baptiste Arban's Complete Conservatory Method (1864) is the foundational text for almost all modern brass pedagogy. While it’s packed with technical drills, the "interesting content" usually refers to the 14 Characteristic Studies and the Fantaisies and Variations that conclude the book. Core Technical Sections arban studies pdf