"Principles of Prescribing" by K N Mathur was first published in 1975 and thereafter has exhausted many editions due to it's ever rising demand in the market. This is a book containing 30 chapters showing various methods on which prescriptions can be based. Though not all of the approaches are widely accepted or utilised, the homeopaths can get an idea as to how they are to be applied and can judge for themselves. Different methods are demonstrated including prescribing on the totality, miasms, keynotes, organ affinities, direction of cure, and repertorisation. Cases that are illustrated in this book are from Masters like as Hering, Dunham, Lippe, Boger, Kent, Nash, Burnett, and others. This book is essential for advancement of homeopathy and homeopaths.