New Yorker Molly Blum knows everything about her lifelong nemesis, Jude Stark. With their families so close, they should have been best friends. Instead, she thinks he’s a too-charming slacker, and he thinks she’s allergic to fun. After years of one-upping each other’s pranks (chocolate-dipped cat treats are not as delicious as they appear), one high school joke went too far, and they stopped speaking completely. But now that they’re supposed to help plan a massive party for their parents—together—there’s no better time to resume their war. And it is on. Only somewhere between all the sniping and harmless hijinks, a reluctant friendship develops, along with an unexpected spark of sexual tension. Falling in love, on the other hand, is a whole new battlefield.