Book excerpt: Douglas Hill is professor of music and horn at the University of Wisconsin at Madison as well as a past President of the International Horn Society, and a respected teacher and clinician. The 27 chapters of Collected Thoughts cover topics ranging from getting started to preparing for college and professional auditions, and include other subjects such as composing and improvising. There are seven chapters on repertoire that include reviews of music and texts that are the most comprehensive of any horn (or other instrumental) text to date. The process of learning and teaching is extremely insightful for everyone, from the serious student to the most experienced instructor. This book is a must for anyone interested in the horn. It is invaluable!!