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.
7 BOOK BUNDLE: Crack The Whip! (TABOO FEMDOM EROTICA: Dominate Hubby! Humiliate the Sissy Cuckold!)
Lovely Laura the Futa Girl: Friends with Benefits
Pool Shark and Other Femdom Stories
Abducted into the Third Gender: 180 Degrees Turn (Hijra, the Third Gender)
A Slippery Slope in a Bank (Forced to Work in Girls' Uniform)
Emily's Experiment: Becoming Her Girlfriend (A Gender Swap Story)
Becoming the Goddess (Gender Bender, Gender Transformation, Feminization)
The Challenge: Femdom, Forced Feminization, Caning and Chastity: A BDSM Fetish story, of Female Domination, Forced Feminization & Enforced Male Chastity (The Teacher's Pet Femdom & BDSM Saga Book 1)
Owned By Him (Transgender Slave Erotica)
Sassy and her Sissy: Make him Pay