Tiffany Reisz is an American author renowned for her work in the genre of erotica, particularly the Original Sinners series. The series has been published by Harlequin imprint Mira Books and has earned praise, being described as "smart smut" by NPR and "Fifty Shades for adults" by Salon. Reisz's writing is characterized by witty depictions of sex and a significant use of religious imagery and themes. In 2014, she was recognized by USA Today for her diverse characters.

Born in Owensboro, Kentucky, Tiffany graduated from Centre College with a B.A. in English and attended Asbury Theological Seminary in Wilmore, Kentucky. She began her writing career while still a student. Her debut novel, The Siren, has sold over half a million copies worldwide.

Beyond erotica, Reisz writes mainstream women's suspense fiction, including The Bourbon Thief, which won the RT Book Reviews Seal of Excellence Award, and the RITA®-nominated The Night Mark. Her erotic fantasy The Red was self-published under the banner 8th Circle Press and named an NPR Best Book of the Year, also earning a starred review from Library Journal.

Reisz has won several awards, including the RITA Award and a Lambda Literary Award. She resides in Louisville, Kentucky, with her husband, novelist Andrew Shaffer, and their two cats.