The idea for writing this basic HPLC book was probably born during the project sanctioned by University Grants Commission - Pune. This book was written as an updated reference guide for busy laboratory analysts and researchers. Topics covered include HPLC operation, method development and validation aspects. This book can serve as a supplementary text for students pursuing a career in analytical chemistry. It describes basic theories and terminologies for the novice and reviews relevant concepts, best practices, and modern trends for the experienced practitioner. A reader with a science degree and a basic understanding of chemistry is assumed.