This book is an overview textbook of information visualization techniques. The first chapter is very enticing- -it describes many visualization problems, and provides some historical examples of specific visualization techniques of the past. The rest of the book takes up assorted topics such as representation, internal models, and connectivity, and provides some examples of visualization techniques. Unfortunately, the text is too concise to be used for independent study. I found myself puzzled over how to interpret most of the new visualization techniques. For most of the techniques, Spence provides little or no guidance about interpretation, and few suggestions about how to make effective use of the techniques. An instructor who is a specialist in the subject would presumably be able to provide the missing information, but readers who pick up this book on their own might not be able to gain the information they are seeking. The publisher has also developed a companion Website for the book, with exercises and answers, dynamic examples, and OHPs for classroom use. It would have been nice, however, to also provide the materials on a CD-ROM for users who do not have continuous broadband access to the Net.