This is the Arban Brass Method, a method book that is considered a bible for all brass instrument players, especially trumpet players. This is a set of Volume 1 & Volume 2. This is the treble clef version. The yellow-covered edition from Zen-On Music is said to still be very popular. The condition is very poor, with writing, folds, and tears visible on the cover. However, the inner pages appear to be in good condition. We recommend this for self-publishing (splitting the pages of the book, scanning them, and converting them into PDF files for personal ownership) by disassembling the spine. Please consider this opportunity.