Henry Edward Krehbiel’s book “How to Listen to Music, 7th ed.” is a reference meant to improve readers’ appreciation of classical music. Published by Project Gutenberg, it is meant for casual art enthusiasts rather than professional musicians. Broad guidance on composers, styles, instruments, settings, and whether or not to believe critics is provided in the book. It makes difficult musical topics understandable to readers with varying degrees of musical background by breaking them down into simple explanations.