Six years after the fight that ended their friendship, Daphne Berg is shocked when Drue Cavanaugh walks back into her life, looking as lovely and successful as ever, with a massive favor to ask. Daphne hasn't spoken one word to Drue in all this time--she doesn't even hate-follow her ex-best friend on social media--so when Drue asks if she will be her maid-of-honor at the society wedding of the summer, Daphne is rightfully speechless. Drue was always the one who had everything--except the ability to hold onto friends. Meanwhile, Daphne's no longer the same self-effacing sidekick she was back in high school. She's built a life that she loves, including a growing career as a plus-size Instagram influencer. Letting glamorous, seductive Drue back into her life is risky, but it comes with an invitation to spend a weekend in a waterfront Cape Cod mansion. When Drue begs and pleads and dangles the prospect of cute single guys, Daphne finds herself powerless as ever to resist her friend's siren song. A sparkling novel about the complexities of female relationships, the pitfalls of living out loud and online, and the resilience of the human heart, Big Summer is a witty, moving story about family, friendship, and figuring out what matters most.