Gus and Duncan's Guide to Star Wars Prototypes is a book that details the production process behind many of the toys created by Lucasfilm-licensed toymakers, such as Kenner. The book, written by Duncan Jenkins and Gus Lopez and published in 2010 by Completist Publications, includes color photographs of such production items as wax sculpts, silicon molds, tooling masters, and paint masters, as well as concept sketches, proof cards, and color specification sheets.