From New York Times bestseller Elle Cosimano comes Finlay Donovan Crosses the Line—the highly anticipated next installment in the beloved Finlay Donovan series.

Life hasn’t been easy for Finlay Donovan lately, but it just got a whole lot harder. Her nanny and partner-in-crime, Vero, has been extradited from Virginia to Maryland, where she’s facing criminal charges for a theft she swears she didn’t commit. A prisoner to an ankle bracelet as she awaits her trial, Vero is forced to live with her overbearing mother and nosy aunt. Threatening messages keep arriving on her mother’s door, demanding Vero “turn over the money . . . or else.” And if she doesn’t figure out who really stole her former sorority’s treasury funds, her next home might be a prison cell.

But proving her innocence might be an impossible feat. Vero was the treasurer of her sorority when the money went missing—one of the only people who had access to the cash. And her alibi is a date who ghosted her. With her court date quickly approaching, and her mysterious stalker on her tail, Vero needs to clear her name fast.

Finlay decides a trip to Maryland is in order. After all, Vero stood by her through her darkest moments, and Finlay will be damned if she lets her best friend and children’s nanny be convicted for something she didn’t do. She sets off on a mission to sus out the real thief and bring Vero home.

Published
March 17, 2026
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Finlay Donovan

The series

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In the Finlay Donovan series, Elle Cosimano blends humor, suspense, and heart in a story that pulls readers in with its quirky protagonist and unexpected twists. Finlay Donovan is a single mother and struggling novelist whose life takes a bizarre turn when she’s mistakenly identified as a contract killer. What follows is a wild ride through dangerous (and sometimes hilarious) situations as Finlay juggles the demands of motherhood, writing deadlines, and the ever-growing pile of trouble she finds herself in.

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What makes this series stand out is how effortlessly it weaves together relatable, everyday challenges with absurd, high-stakes drama. Cosimano creates a world where mundane life—parenting, paying bills, and keeping up with work—collides with the chaos of mistaken identities, unexpected criminal activity, and plot twists that keep readers on the edge of their seats. Each book explores Finlay’s growth as a character, from her reluctance to get involved in dangerous situations to her ultimate embrace of the wild ride life throws her way.

The Finlay Donovan books are not just about thrilling capers and laugh-out-loud moments. At their core, they touch on themes of resilience, self-discovery, and the unexpected ways people can change their lives—even when they’re just trying to get by. With clever dialogue, fast-paced narratives, and a lovable lead, this series offers something rare: a mystery that’s as heartwarming as it is heart-pounding.

Whether you’re in the mood for a story with a bit of dark comedy, an action-packed plot, or simply a character who feels like a friend (albeit a slightly chaotic one), Finlay Donovan is sure to entertain. With each new installment, the stakes get higher and the laughs get louder—offering a refreshing spin on the cozy mystery genre.

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