Every Friday I take the initiative to search through thew newly free titles on Amazon, and to identify those that might be of interest to trans* readers, fans, and lovers. Even if you don't have a Kindle, you can still download the titles through one of Amazon's free reading applications, and covert it (if need be) with Calibre. I can tell you I do most of my reading on my iPad, using Kindle for iPad, and it works beautifully.
Please do be sure to check the price before downloading anything, though, as most freebies are limited time offers, and some are specific to certain regions.
Gender Bender Fiction Bundle
Serving the Futa Queen (Queen of the Futa Dorms 1)(Futa-on-Female, Futa-on-Futa, Menage, College, BDSM, Exhibitionism Erotica)
Submit to the Futa
Pegged by the Viennese Barista
Darkfallen: Taking Jacob
Gender Bending Investigations: An Erotic Transgender Transformation Adventure
The Horse Mistress: Book 1
EROTICA: WEDDING NIGHT: GOOD BOY (NOW WEAR MY DRESS!) Sexy Feminized Sissy Husband Short Story Bundle
Trapped In A Woman's Body Box Set: Three Erotic Sissy Gender Transformation Tales!
Ms. Billionaire: A gender transformation romance.
Alexis 1: Her Feminine Cocoon
The Bull in Charge: A Cuckold Story