The new fourth edition is enhanced by new visual connections between works, more use of color and architectural diagrams, an enhanced map program, new boxed readings, and more. In addition, the text's illustration program is now available to adopting instructors in digital format via The Image Vault--McGraw-Hill's new Web-based presentation manager. Instructors can incorporate images from The Image Vault in digital presentations that can be used in class offline, burned to CD-ROM, or embedded in course Web pages.