Books about web resources often consist of lengthy lists of long URLs, many of which were out of date before publication. Written by Dodsworth and Laliberté, this new guide to online historical geographic resources is not one of those books. Yes, the book has lists, but they make up only a small portion of the total volume. In addition, most sites listed originate with university libraries or government agencies, which tend to have somewhat more stable URLs. With its detailed descriptions of cartographic resources and the authors’ guidance on the use of those resources, this is a valuable book for librarians. For example, the section on fire insurance maps contains a short history of insurance cartography as well as a brief discussion of color and symbols, scale and corrections, uses in historical research, and a guide to accessing these resources. Overall, this is a very useful introduction to geographic resources (primarily maps and aerial imagery). Although the chapters are brief, they provide adequate summaries of resources. Readers needing more information should consult the reference section located at the end of each chapter. . . .[T]he book is very useful for librarians and others looking for a quick primer on historical cartographic resources located on the web. Summing Up: Recommended. Lower-division undergraduates and above; general readers.