Poppy and Alex. Alex and Poppy. They have nothing in common. She’s a wild child; he wears khakis. She has insatiable wanderlust; he prefers to stay home with a book. And somehow, ever since a fateful car share home from college many years ago, they are the very best of friends. For most of the year they live far apart—she’s in New York City, and he’s in their small hometown—but every summer, for a decade, they have taken one glorious week of vacation together.

Nora Stephens' life is books—she’s read them all—and she is not that type of heroine. Not the plucky one, not the laidback dream girl, and especially not the sweetheart. In fact, the only people Nora is a heroine for are her clients, for whom she lands enormous deals as a cutthroat literary agent, and her beloved little sister Libby. Which is why she agrees to go to Sunshine Falls, North Carolina, for the month of August when Libby begs her for a sisters’ trip away.

Augustus Everett is an acclaimed author of literary fiction. January Andrews writes best-selling romance. When she pens a happily ever after, he kills off his entire cast. They’re polar opposites. In fact, the only thing they have in common is that for the next three months, they're living in neighboring beach houses, broke, and bogged down with writer's block.

Daphne always loved the way her fiancé Peter told their story. How they met (on a blustery day), fell in love (over an errant hat), and moved back to his lakeside hometown to begin their life together. He really was good at telling it…right up until the moment he realized he was actually in love with his childhood best friend Petra. Which is how Daphne begins her new story.

After a wild bet, gourmet grilled-cheese sandwich, and cuddle with a baby goat, Alexis Montgomery has had her world turned upside down. The cause: Daniel Grant, a ridiculously hot carpenter who’s ten years younger than her and as casual as they come—the complete opposite of sophisticated city-girl Alexis. And yet their chemistry is undeniable.

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.

Kristen Petersen doesn't do drama, will fight to the death for her friends, and has no room in her life for guys who just don't get her. She's also keeping a big secret: facing a medically necessary procedure that will make it impossible for her to have children. Planning her best friend's wedding is bittersweet for Kristen - especially when she meets the best man, Josh Copeland. He's funny, sexy, never offended by her mile-wide streak of sarcasm, and always one chicken enchilada ahead of her hangry. Even her dog, Stuntman Mike, adores him. The only catch: Josh wants a big family.

June O'Donnell - aka Junior, aka Jack, aka Jonathan O'Donnell IV, aka the first female O'Donnell firstborn - has always been haunted by her family's mythic but complicated legacy. As she prepares to begin her final year of high school, June is itching to leave behind her ghosts in Five Fingers, Michigan, and travel the world. And then, just like it always happens to the O'Donnells, a painful glimmer from her past returns to mess everything up. Enter Saul Angert, the eldest son of Eli Angert, aka June's late father's mortal enemy.

Sasha has had it. She cannot bring herself to respond to another inane, “urgent” email or participate in the corporate employee joyfulness program. She hasn’t seen her friends in months. Sex? Seems like a lot of effort. Even cooking dinner takes far too much planning. Sasha has hit a wall. Armed with good intentions to drink kale smoothies, try yoga, and find peace, she heads to the seaside resort she loved as a child. But it’s the off season, the hotel is in a dilapidated shambles, and she has to share the beach with the only other occupant: a grumpy guy named Finn.

Naomi wasn’t just running away from her wedding. She was riding to the rescue of her twin. Too bad for Naomi, her evil twin hasn’t changed at all. After helping herself to Naomi’s car and cash, Tina leaves her with a niece she didn’t know she had. Now, she’s stuck in town with no car, no job, no home - and an 11-year-old to take care of. Since Naomi’s life imploded right in front of him, the least Knox can do is help her out. And just as soon as she's out of trouble, he can get back to his peaceful, solitary life. That’s the plan, until the trouble turns to real danger.

Rosie Belmont has been driving me wild for years. The good kind of wild. The bad kind of wild. But mostly the kind of wild that comes with wanting your best friend’s little sister and knowing you can’t have her. After living in the city, she comes blasting back into Rose Hill like a storm. Beautiful, messy, and chaotic. And one wide-eyed desperate plea for a job is all it takes for me to hire her.

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.

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.

Holly is dealing with the impending death of her grandmother and still reeling from a bad breakup. One bright spot: a Valentine’s Day card on Holly’s windshield—even if it wasn’t meant for her. An amusing mistake soon turns into a lovely exchange of anonymous notes, little acts of kindness, and a growing affection between two strangers. What happens when one of them has to say goodbye?

Hollis Shaw, creator of the popular food blog, Hungry with Hollis, is shocked when her heart surgeon husband, Matthew, is killed in a one-car accident on a snowy morning. The cracks in Hollis’s perfect life—her strained marriage and her complicated relationship with her daughter, Caroline—grow deeper. So when Hollis hears about something called a “Five-Star Weekend”—one woman organizes a trip for her best friend from each phase of her life: her teenage years, her twenties, her thirties, and midlife—she decides to host her own Five-Star Weekend on Nantucket.