Another race also inhabits this Earth, a race four inches tall that lives and moves very quickly, and they are called "nomes." Masklin, the leader of a dwindling band of nomes, decides that a better life must be found, so they stowaway aboard a truck, and find themselves taken to a huge department store. This department store, Arnold Bros. (est. 1905), is populated by thousands of nomes, something the humans above then never suspect. To Masklin and his band this place looks like heaven, but what is the meaning of the signs that read, "Final Sale: Everything Must Go?"
This book is a laugh-riot. Terry Pratchett succeeds is making the Nomes so different, and yet so human. This book is the first of a trilogy; with the other two entitled Diggers and Wings.