Melody Lewis & Steam Books 
Destined in the Dark – Historical Cross-Dressing Medieval M/M Erotica from Steam Books [EPUB ebook] 

In the middle ages, a young lad named Gabe plots an assassination to avenge his sisters death. Gabe goes undercover as a prostitute in a brothel, planning to lure his sisters murderer, the Count. However, Gabe is about to learn some unexpected, fascinating, and sexy things about the Count, his sisters death, and himself. WARNING: This 3, 779-word story is a steamy read that features explicit content and may be too hot for some readers to handle!