Book excerpt: Essential for reference work and indispensable for collection development, this book helps you quickly identify the best, most affordable, and most appropriate new reference titles in any given field. The approximately 500 books reviewed in this 23rd annual edition have been selected from American Reference Books Annual (Libraries Unlimited, 2003) as the best works for smaller libraries. A must if your budget precludes ARBA, this time-saving tool also makes an excellent supplement.