The many lives of theoretical physicist Elsie Hannaway have finally caught up with her. By day, she’s an adjunct professor, toiling away at grading labs and teaching thermodynamics in the hopes of landing tenure. By other day, Elsie makes up for her non-existent paycheck by offering her services as a fake girlfriend, tapping into her expertly honed people pleasing skills to embody whichever version of herself the client needs. Honestly, it’s a pretty sweet gig—until her carefully constructed Elsie-verse comes crashing down. Because Jack Smith, the annoyingly attractive and broody older brother of her favorite client, turns out to be the cold-hearted experimental physicist who ruined her mentor’s career and undermined the reputation of theorists everywhere. And that same Jack who now sits on the hiring committee at MIT, right between Elsie and her dream job. Elsie is prepared for an all-out war of scholarly sabotage but…those long, penetrating looks? Not having to be anything other than her true self when she’s with him? Will falling into an experimentalist’s orbit finally tempt her to put her most guarded theories on love into practice?

She’s off-limits, but he’s never been good at following the rules. For the first time in her life, Clementine “Emmy” Ryder has no idea what she’s doing. She’s accomplished everything on her to-do list. She left her small hometown of Meadowlark, Wyoming; went to college; and made a career for herself by doing her favorite thing: riding horses. But after an accident makes it impossible for her to get back into the saddle, she has no choice but to return to the hometown she always wanted to escape. Luke Brooks is Meadowlark’s most notorious bad boy, bar owner, and bachelor. He’s also the unofficial fifth member of the Ryder family. As Emmy’s older brother’s best friend, Luke spent most of his childhood antagonizing her. It’s been years since he’s seen her, but when she walks into his bar and back into his life, he can’t take his eyes off her. Despite his better judgment, he wants to do a whole lot more than just look at her. Emmy’s got too much on her mind to think about romance. And Luke knows he should stay away from his best friend’s younger sister. But what if Luke is just what Emmy needs to get her spark back? Or will they both go up in flames?