These introductions were my opportunity to epitomize the Gurus' philosophy. While appearing at the front of a book, they must be written after all other work is completed, so as not to shortchange the author. Each of these was a major project, and the results continue to surprise me, almost as if the Gurus had used me for a conduit. My first one, for Darsanamala, felt very much like giving birth, and had an equally long gestation period. Many readers skip introductions, missing out on really useful information. I invite you to allow these essays to whet your appetite for the delectable works they beckon to.