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 arrogant 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 he's the same Jack Smith who rules over the physics department at MIT, standing 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?

Hallie Piper is turning over a new leaf. After belly-crawling out of a hotel room (hello, rock bottom), she decides it's time to become a full-on adult. She gets a new apartment, a new haircut, and a new wardrobe, but when she logs onto the dating app that she has determined will find her new love, she sees none other than Jack, the guy whose room she snuck out of.

After the joint agreement that they are absolutely not interested in each other, Jack and Hallie become partners in their respective searches for The One. They text each other about their dates, often scheduling them at the same restaurant so that if things don't go well, the two of them can get tacos afterward.

Spoiler: they get a lot of tacos together.

Discouraged by the lack of prospects, Jack and Hallie make a wager to see who can find true love first, but when they agree to be fake dates for a weekend wedding, all bets are off. As they pretend to be a couple, lines become blurred and they each struggle to remember why the other was a bad idea to begin with.

To win the job of her dreams, a relationship-prone journalist needs to learn how to stay single in this heartwarming and hilarious new romantic comedy from the beloved author of Lease on Love.

Lana Parker is an expert girlfriend. After a disastrous breakup with her high school boyfriend, she's bounced from long-term relationship to long-term relationship and even works as the dating and relationships columnist for one of Los Angeles's trendiest websites. But when Lana suddenly finds herself single, she's ready to take a break, both personally and professionally. That is, until her high school ex, Seth Carson, takes an assignment at Lana's site. Having spent years traveling the world as a freelance journalist, Seth's finally ready to put down roots.

Seth and Lana's chemistry is just as combative—and undeniable—as ever and quickly leads to a competition that could shape both of their careers. Pitted against each other by Lana's boss, they are each tasked with writing an article series that goes against their usual dating type: Lana needs to write about being single and staying single, while Seth must learn to settle down and become boyfriend material. Whoever's series is most popular wins a highly coveted dream job. But when the two square off, it's not only their careers on the line—it’s also their hearts.