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 tablet, using Kindle for PC, 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.
From Thomas to Thérèse: A journey of transformation and submission
Boy Whore of Westwood
Kidnapping the Queen: A Yaoi Fantasy
Sorority Shapeshifters: A Naughty Frat Pledge is Punished
Female Forever: The Gender Swapping the Frat Bundle
Adult Series: THE COFFEESHOP DOMINATRIX PART III - My First Slave Auction: A Story Of Sensual Female Domination
TINDER SURPRISE III: Orgasm Ruination
Swamp Beast Impregnation
Maid to Serve (My Futa Mistress 1)
Good Wife Seduction (Naughty Futa Preacher)
Transgender Romance: Changing the Game
Judy and Her Ladyboy: Salt and Pepper
A Slippery Slope in an Amish Community: Forbidden Desires
The LAPD Beat: Episode One: Cynthia Silver