The Yearbook of Anesthesiology remains the most popular and sought-after update book for Anesthesiologists and students of Anesthesiology and Critical Care. The reader base of the book has continued to rise steadily with each succeeding edition. This 12th edition is different from earlier editions and has a significant focus on emerging technologies and techniques. Those with a background in anesthesiology should find the book a valuable introduction to the diverse applications of technology in health. This edition is focused on professionals who want to keep up-to-date with developments in the field of Anesthesiology and Critical Care. It is suitable as a textbook for postgraduate training in the clinical aspects of Anesthesiology and Recent Advances in the field. The book attempts to cover topics from all subspecialty spectrums of Anesthesiology. The book also forays into the future and discusses the challenges likely to be faced by the profession of Anesthesiology and Critical Care in the coming times.