Viola Bowen has the chance of a lifetime: to design a video game based on her all-time favorite book series. The only problem? Her co-lead is Jesse F-ing Andrews, a.k.a. her arch-nemesis. Jesse has made it abundantly clear over the years that he wants nothing to do with her–and Viola has no idea why. When their bosses insist a wintery retreat is the perfect team-building exercise, Viola can’t think of anything worse. Being freezing cold in a remote mountain lodge knowing Jesse is right next door? No, thank you.

Georgia Woodward lives by her lists, none more so than the one about her ex, Eli Mora. It’s full of the ironclad dos and don’ts they’ve been following since she returned to the Bay Area after their cataclysmic breakup five years ago. With the wedding of their mutual best friend, Adam, looming, and them about to step into their roles as best woman and man, Georgia’s never needed it more. She refuses to threaten their tight-knit friend group with her messy—and still very present—feelings. The rules on that list will keep her cool, calm, and compartmentalized.

Ama Torres is an optimistic wedding planner who doesn’t believe in marriage. But weddings? They’re amazing. Elliot Bloom is a brooding florist who hates owning a flower shop…until a certain bright-eyed, donut-loving workaholic shows up at his door. Once upon a time, they collaborated on events by day, and by night, Ama traced the intricate flower tattoos etched along his body. Then Ama shattered his heart and never spoke to Elliot again. Now they’re working on an event that could make or break both of their careers—except neither of them has gotten over what happened two years ago.

Rue Siebert might not have it all, but she has enough: a few friends she can always count on, the financial stability she yearned for as a kid, and a successful career as a biotech engineer at Kline, one of the most promising start-ups in the field of food science. Her world is stable, pleasant, and hard-fought. Until a hostile takeover and its offensively attractive front man threatens to bring it all crumbling down.

Zanders: Chicago hockey isn't complete without me—everyone's favorite player to hate. I know my role, and I play it well. In fact, I thoroughly enjoy spending the majority of my game time in the penalty box before leaving the arena with a new girl on my arm each night. What I don't like is the new flight attendant on our team's private plane. She works for me, not the other way around. But I'll be sure to remind her of that, and I can guarantee, by the end of the season, she'll be begging to quit her job.

Knox Holland is in a jam. After an incredible first year on the pro motocross circuit, he should be on top of the world. Instead, his bad reputation has landed him without a team. He's untouchable and desperate to turn it around. Which is how he ends up at my gym asking me to train him. As a college gymnast with two Olympic medals to my name, I know a thing or two about the pressure to succeed. Last season I choked and then injured myself before I could show the world that I'm not a twenty-year-old has-been.

People say the devil has many faces, but I know only one. Julian Lopez—my childhood rival and family frenemy. I vow to steer clear of him while recovering from my broken engagement, but then the billionaire makes an irresistible offer. Renovate a historic house together and triple our profits. Our temporary truce becomes compromised as we face years’ worth of denied attraction and mixed emotions. Giving into our desire is inevitable...but falling in love? That isn’t part of the plan.

Wells Whitaker was once golf’s hottest rising star, but lately, all he has to show for his “promising” career is a killer hangover, a collection of broken clubs, and one remaining supporter. No matter how bad he plays, the beautiful, sunny redhead is always on the sidelines. He curses, she cheers. He scowls, she smiles. But when Wells quits in a blaze of glory and his fangirl finally goes home, he knows he made the greatest mistake of his life.

After my ex crushed my dreams in the music industry, I’m done with getting my heart broken. Working as an assistant for an NHL player was supposed to be a breeze, but nothing about Jamie Streicher is easy. He’s an intimidatingly hot, grouchy jerk who can't stand me. The guy has a massive ego. Keeping things professional will be no problem, even when he demands I move in with him.

Demi Crawford was Magnolia Falls royalty. I was the boxer from the wrong side of the tracks. She was the epitome of everything good, while I was broody and rebellious. We couldn’t be more different. Her family was enemy number one which made her guilty by association. I despised her before I even knew her. It was easier that way. But now she’d moved in next door to me, and she was everywhere I turned. I couldn’t avoid her no matter how hard I tried. She was beautiful and honest and sweet. Everything I knew I shouldn’t want. Shouldn’t need.

As a third-year PhD candidate, Olive Smith doesn't believe in lasting romantic relationships—but her best friend does, and that's what got her into this situation. Convincing Anh that Olive is dating and well on her way to a happily ever after was always going to take more than hand-wavy Jedi mind tricks: Scientists require proof. So, like any self-respecting biologist, Olive panics and kisses the first man she sees.

Cocky and charismatic Emmett Rhodes isn’t the relationship kind of guy, but now that he’s running for mayor of our small town, his bachelor past is hurting the campaign.

One night. No names. No commitment. That was our agreement. But Spencer Lancaster was addictive. And I was high. High off his taste, starved for his kiss, and desperate for his touch. So when he asked me to stay, to enjoy his company for more nights than I knew I should, I wasn't in the right mind to say no. Everything was perfect. A dream come true. But half a world away, there were secrets. Lies. Insecurities. All of the truths that could tear us apart.

If anyone ever said being an adult was easy, they hadn't been one long enough. Diana Casillas can admit it: she doesn't know what the hell she's doing half the time. How she's made it through the last two years of her life without killing anyone is nothing short of a miracle. Being a grown-up wasn't supposed to be so hard.

Mara, Sadie, and Hannah are friends first, scientists always. Though their fields of study might take them to different corners of the world, they can all agree on this universal truth: When it comes to love and science, opposites attract and rivals make you burn….