Isis Orb (The Xanth Novels)

"In Xanth, everyone has a talent. But that doesn't mean everyone loves his talent, and no one understands that better than Hapless. Endowed with the ability to conjure any instrument he wants, Hapless could be an extraordinary musician if only he could play a tune that didn't fall ear-piercingly flat. His one desire is to find an instrument he can play--and maybe a girlfriend or three. But like music, women have never been his forte"--Amazon.com.