Not music, but words printed on pages
Many of you may have noted lists of books that David recommends as part of his teaching. I've now read two that he likes, both by author Daniel Coyle: The Talent Code (Bantam Books 2009) and The Little Book of Talent (Bantam Books 2012). A lot of fascinating - and immediately applicable - information about how our brains work, how we learn, and how we can get the most out of practicing anything, including harmonica. Available in many public libraries, or wherever books are sold (and give your local independant bookseller a shot before going to an on-line retailer).