Authors Lynda M. Kellam (Data Services and Government Information Librarian at the University of North Carolina at Greensboro) and Katharin Peter (Social Sciences Data Librarian at the Von KleinSmid Center Library for International and Public Affairs at the University of Southern California) have produced the first book on this new subspecialty within academic librarianship. Data librarianship has emerged from the increasing ease of online access to numerical data. Offering services in this new area requires librarians to know about both old sources (for example, U.S. Census information) and emerging sources and at times even to synthesize numerical information. The book contains an introduction to numeric data services; a list of steps for developing, implementing, and evaluating a data services reference program; perspectives on reference, instruction, and the future of numeric information services; an annotated list of sources; and a sketch of “a day in the life” of a numeric data services librarian. The book’s description of the development and implementation of numeric data services would serve as a good refresher for a manager interested in developing any new library service. “A day in the life” includes interview answers from nineteen data librarians to questions such as “What is the one thing you wish you had known about being a data librarian when you started your position?” and “What would you tell a new librarian who is starting a career in data librarianship?” The comprehensiveness of the annotated list of sources is impressive. More than thirty sources are organized geographically and by compiler type (governmental or nongovernmental), and each receives a thorough and useful description. Although this book is scholarly, the writing style is imbued with fun and enthusiasm. At $80, this excellent paperback is pricey, but libraries that want to develop a numeric information program will find the cost worthwhile. Highly recommended for academic librarians interested in learning about or implementing a numeric data services program.