Marriage to a Billionaire Books in Order

The Marriage to a Billionaire books are Jennifer Probst in full catnip mode: marriage deals, family pressure, big money, bigger emotions, and characters who swear they can keep love out of the contract. Of course, that never lasts.

The series starts with The Marriage Bargain, where Alexa McKenzie and Nicholas Ryan strike a practical deal that is supposed to solve two separate problems. That setup tells you almost everything you need to know about the tone. These books love a bold romantic premise, but Probst also gives the relationships room to breathe, fight, and get messy.

A lot of the ongoing thread comes from the people around the couple, especially the Conte family and the wider circle connected to the bakery business La Dolce Famiglia. The books move between New York and Italy, and that Italian family energy matters. There are traditions, loud opinions, old expectations, and plenty of moments when private feelings become everybody's business.

Each novel follows a different central couple. The Marriage Trap shifts to Michael Conte and Maggie Ryan, mixing fake engagement tension with Milan glamour. The Marriage Mistake turns to Carina Conte and Max Gray, where a long-running crush and one very bad surprise push them into a marriage neither planned. The Marriage Merger focuses on Julietta Conte, a career-first heroine whose business instincts are a lot steadier than her trust. Then The Marriage Arrangement adds a later novella-sized return to the world.

There is also The Book of Spells, a bonus story tied to the series' signature love-spell idea. It is more of an extra than a main entry, but it fits the playful side of this world and gives longtime readers one more visit with characters they already know.

What keeps the series moving is the mix of fantasy and familiarity. Yes, the men are wealthy, the apartments are gorgeous, and the travel is nice. But the real pull is simpler than that. Probst likes strong heroines, emotionally stubborn heroes, and couples who have to learn that wanting control is not the same thing as being safe.

If you like marriage-of-convenience romance, strong family connections, and a blend of heat, humor, and heartfelt payoff, this is one of her clearest starting points. It is best read in order, because the side characters and family ties build from book to book, even when each romance has its own ending.