The American Roommate Experiment by Elena Armas

From the author of the Goodreads Choice Award winner The Spanish Love Deception, the eagerly anticipated follow-up featuring Rosie Graham and Lucas Martín, who are forced to share a New York apartment.
Rosie Graham has a problem. A few, actually. She just quit her well paid job to focus on her secret career as a romance writer. She hasn’t told her family and now has terrible writer’s block. Then, the ceiling of her New York apartment literally crumbles on her. Luckily she has her best friend Lina’s spare key while she’s out of town. But Rosie doesn’t know that Lina has already lent her apartment to her cousin Lucas, who Rosie has been stalking—for lack of a better word—on Instagram for the last few months. Lucas seems intent on coming to her rescue like a Spanish knight in shining armor. Only this one strolls around the place in a towel, has a distracting grin, and an irresistible accent. Oh, and he cooks.

Lucas offers to let Rosie stay…