By Paul Neri. 

Learn to diagnose common problems relating to the adjustment, upkeep and repair of your acoustic guitar, as well as nylon-string guitars and ukuleles. Topics include: humidity • cracks • braces • bridge plates • frets • guitar action • intonation • neck angle • tuning machines • strings • strap buttons • end pins • buying a used guitar • cleaning & polishing • pickups • and much more.