ROMANCE THAT PACKS A PUNCH
Serving Knockouts - In and Out of the Cage
Nikki Castle writes steamy, emotional MMA romances that hit just as hard as her heroes do. Based in Philadelphia, she is a full-time author by day and co-owner of an MMA gym by night—living the fighter life she writes about.
Before she was putting her characters through emotional and physical battles, Nikki was in the cage herself - both she and her husband are former MMA fighters. That real-life experience fuels every scene, giving her stories an authenticity (and spice level) that readers can’t get enough of.
Her writing journey kicked off during 2020 lockdowns, when she finally sat down to write 5 Rounds—a book she thought no one would read. Spoiler: People read it. A lot of people.
Now, with multiple books under her belt and an ever-growing reader community, Nikki’s here to deliver more heat, more heart, and more emotionally wrecked heroes for you to fall for.
Nikki's Highlight Reel
Total Knockout (literally!)
Before writing about cage fights, Nikki was living through them. She stepped into the ring at Madison Square Garden and won! Total main character moment.
Dog Mom… Times Several.
Nikki’s house is a revolving door of puppy love. Between her own dogs and a steady stream of foster pups, there’s always someone begging for snacks.
Fluent in Spice & Hungarian
Thanks to her Hungarian immigrant parents, Nikki can fluently dish out love, sass, and the occasional swear word in two languages. Multilingual skills, activated.
Join the Reader Group
Want to be the first to know everything that's going on in the Nikki Castle universe? Join the official reader group on Facebook and see behind the curtains!
✔ Early access to everything
✔ Behind the scenes
✔ Exclusive giveaways
✔ Book clubs
✔ Meet new friends and have fun!
