RK Lilley Books in Order

If you want the signature billionaire romance: In Flight → Mile High → Grounded → Mr. Beautiful
If you want the most emotional, high-angst series: Bad Things → Rock Bottom → Lovely Trigger
If you want an age-gap romance with mystery: The Wild Side → Iris → DAIR
If you want a shorter duet full of second chances and revenge: Breaking Him → Breaking Her
If you want fantasy instead of contemporary romance: Breathing Fire

R.K. Lilley writes romance that runs hot, emotional, and a little dangerous. Many readers first meet her through In Flight, the book that launched the Up in the Air series, but her work also stretches into the bruised love story of Bad Things, the age-gap mystery of The Wild Side, and the paranormal turn of Breathing Fire.

Her public bio keeps the basics simple. She has loved reading and writing fiction for as long as she can remember, and before publishing books she worked a mix of jobs that later fed straight into her stories, including time as a first class flight attendant and work as a stablehand. Those details tell you a lot about her books. They tend to feel lived in rather than borrowed.

The flight attendant years mattered in a very direct way. Lilley has said she always wanted to write a book about that world, and In Flight became the one that opened the door. The job gave her a setting full of long hours, polished surfaces, wealthy passengers, and the strange intimacy of travel, and that texture shows up all through Bianca and James's story.

She does not write small feelings.

Across her romance series, readers usually come for intensity and stay for the emotional chaos. In Up in the Air, that means luxury travel, power games, danger, and fierce attachment. In Bad Things, Rock Bottom, and Lovely Trigger, it means a rougher, more tangled love story built on history, damage, and second chances. In The Wild Side, it means an older hero, a younger woman who may or may not be telling the truth, and a mystery that keeps tightening around the romance.

Even when the setup changes, Lilley returns to a few favorite pressures. Her couples want each other badly. They hide things. They push too far, pull back too late, and make the kind of decisions that turn love stories into disasters before they become recoveries. That is a big part of her appeal. The books are not interested in cool detachment. They want the crash, the fallout, and the climb back.

She also likes connected worlds. Side characters rarely stay on the sidelines for long. Lana peels away from the main Up in the Air arc to follow a long-running crush, Mr. Beautiful revisits that same universe from new angles, and The Other Man grows out of the wider orbit around The Wild Side. If you read several of her books in a row, you start to see how much she enjoys letting one couple's story echo inside another's.

Lilley has also written urban fantasy under the name Rebecca K. Lilley. Breathing Fire shifts from contemporary erotic romance into hidden supernatural worlds, dangerous secrets, and dragons, but it still carries the same interest in high-stakes attraction and people who love hard even when it makes their lives worse before it makes them better. The genre changes, but the emotional temperature does not.

That seems to be the sweet spot.

Lilley's public bio says she lives in Texas with her husband and their two sons. Outside the page, she mentions travel, reading, hiking, painting, gaming, and anime among the things she enjoys. That mix fits the books too, part glossy escape, part obsession, part big emotional swing. If you are new to her work, In Flight is the gateway book, Bad Things is a strong pick for readers who want maximum angst, and Breathing Fire is the place to start if you want to see her take that same intensity into fantasy.