Steve Rosenberg and Greg Bassett have published a series of excellent scuba travel eBook guides, and Dive and Travel Grand Cayman has received a silver award in the 2016 North American Travel Journalists Association Travel Media Competition the category "best travel books and guides."
Interactive, it lists more than 75 dive sites, marine life, above-water activities, travel, accommodations, shopping, and site-seeing opportunities, as well as the island's history. It's illustrated with the author's own fine photographs, and it can also be used as a dive log. It's currently $7.23 on Kindle from Amazon.
A new book, still a work in progress, is Dive the Visayas, the Heart of the Philippines. Other books by the same authors include Dive Galapagos (2nd edition) at $14.95 and Dive Cozumel ($8.95), plus A Naturalist's Guide to the Galapagos, which is downloadable for free, and available on iTunes, Amazon, and Google Play. http://www.rosenbergebooks.com