Soul Music by Terry Pratchett

In this book Music With Rocks In It hits Discworld in a big way. When Buddy finds a guitar in a strange shop and forms a band with Glod and Cliff, they start making music that drives everyone wild. Even Death's granddaughter Susan (who's filling in for him) finds herself fascinated by the music. This book had  a lot of clever jokes about rock and roll (and I'm sure I missed many of them as well). An enjoyable read.