Randy does a sorting procedure on the diving books now: he ignores anything that has color photographs, or that appears to have been published within the last twenty years, or that has any quotes on the back cover containing the words stunning, superb, user-friendly , or, worst of all, easy-to-understand . He looks for old, thick books with worn-out bindings and block-lettered titles like DIVE MANUAL . Anything with angry marginal notes written by Doug Shaftoe gets extra points.