The Sanibel Island Mystery series is available in paperback, as an ebook, and as an audiobook on Amazon. You can also find the paperback editions at MacIntosh Books (which will ship books anywhere in the U.S.), Bailey's General Store, and Gene's Books on Sanibel; at the Captiva Provision Company on Captiva (at the South Seas Island Resort); at Annette's Book Nook in Fort Myers Beach; and at select bookstores around the U.S., as well as on Bookshop.org and Barnes & Noble Online.
 

Want your bookstore or library to carry the Sanibel Island Mystery series? Ask them to order the books via Ingram.