With nearly 40 Discworld books, another dozen novels, and a growing canon of related material, it's no surprise that master humorist Pratchett is attracting attention from reference writers. . . . Covering work prior to 2007's Making Money, An Unofficial Companion to the Novels of Terry Pratchett is a start toward a comprehensive Pratchett encyclopedia. Opening with alphabetic and topical lists of entries, the book contains a brief biography of Pratchett; more than 300 entries for books and stories-their themes, characters, and places-as well as spin-off products, collaborators, influences, and adaptations; a select bibliography; and an index.