Di Su is Associate Professor and Head of Reference Services at York College Library of the City University of New York, USA. A person with a wide range of interests, Di has been a contributor to several publications including Information Outlook; Journal of Electronic Resources Librarianship; The Reference Librarian; and more. He was the editor of Evolution in Reference and Information Services: The Impact of the Internet and Collection Development Issues in the Online Environment. This is his first book with Chandos.