The Discworld learns to rock'n' roll in the 15th installment of the humorous fantasy series. Harpist Imp y Celyn (or, as he's called later, Buddy Holly) gets a guitar from a mysterious shop, and invents an entirely new type of music: Music With Rocks In It. Soon, the phenomenon sweeps the city of Ankh-Morpork, and everyone wants to play such great tunes as Good Gracious Miss Polly and Pathway to Paradise. But what terrible price will Buddy and his band have to pay for their unearthly music? That all depends on Susan Sto Helit, a schoolgirl who's just discovered that she's Death's granddaughter (by adoption) and is required to fill in for her dear old granddad, who's gone AWOL again.