The 4th edition of this popular and well-cited text presents a comprehensive review of more than a century of research on information behavior (IB) and related topics with over 1500 citations to relevant works. The book is intended for students and scholars in information studies, education, communication, health, and other disciplines interested in research on people's information activities. This book is used regularly in doctoral and masters-level courses examining IB, information practices, reference services, and information retrieval