The book ?Essentials of Repertorisation? published by Dr. S. K. Tiwari, is an exhaustive work on the subject of repertory and has been written in the most comprehensible language which has made it very popular amongst students and practitioners alike. In this book, all the repertoire be it classical, modern, or regional are well explained with their history, philosophy, construction, advantages, utility, and how to use them, etc. The book also explains the laws and philosophy of homeopathy and the methodology of case taking and working out the case. In addition, there is a separate section devoted to biographies of stalwarts.