Cognitive processes are not constant, but undergo change with age or development and use or learning. Image and Environment, now in paperback, is a pioneer study. It brings a new academic discipline to a wide audience. The volume is divided into six sections, which represent a comprehensive breakdown of cognitive mapping studies: "Theory"; "Cognitive Representations"; "Spatial Preferences"; "The Development of Spatial Cognition"; "Geographical and Spatial Orientation"; and "Cognitive Distance." Contributors include Edward Tolman, James Blaut, Stephen Kaplan, Terence Lee, Donald Appleyard, Peter Orleans, Thomas Saarinen, Kevin Cox, Georgia Zannaras, Peter Gould, Roger Hart, Gary Moore, Donald Griffin, Kevin Lynch, Ulf Lundberg, Ronald Lowrey, and Ronald Briggs.