The Sullivan Brothers Books in Order

The Sullivan Brothers books are one of Kylie Brant's looser family-linked series, more interested in emotional connections than one big continuing mystery. The books share familiar Brant ingredients, old hurts, quick attraction, strong-willed leads, and a touch of danger, but each story stands on its own.

Undercover Lover opens with Ellie Bennett and Sully, longtime friends whose relationship stops being simple. That friends-to-lovers setup gives the series a warm center, even while Sully's secrets keep the tension alive. The suspense is there, but so is the feeling that these two people have been circling each other for a long time.

Heartbreak Ranch shifts the mood west, into ranch country and Jed Sullivan's long-buried feelings for Julianne Buchanan. Home, land, and belonging matter a lot here. The romance is not just about chemistry. It is about what happens when someone you have wanted for years finally comes back within reach, and the past is still standing in the room.

The family ties are important, but the books never feel crowded.

Falling Hard and Fast moves into Louisiana heat, where sheriff Cage Gauthier is juggling a murder case and his growing pull toward Zoey Prescott. That jump in setting tells you a lot about the series. Brant keeps the emotional tone consistent, but she likes changing the landscape around her characters, from ranch country to humid small-town streets.

Across the three books, the appeal is the same. These are romance-forward stories with enough suspense to keep everyone off balance. Expect protective men, heroines who push back, and plots that lean on family history, old longing, and the moment when keeping your distance stops working. Read them in order if you want the family thread to build naturally, but each book can easily stand alone.