The author has attempted to investigate retrieval efficiency of search engines. The work addresses a pertinent question - quality of results, not quantity, which is a big challenge now. The book is undoubtedly, useful for library and information professionals, for its potential as a guide to formulate strategies for new studies to address the questions faced by users as well as information providers. This book may help build a firmer foundation upon which needed skill and understanding can be developed for conduct and evaluation of search engines to evolve the interface design and user...