Holly Goldberg Sloan was born in Ann Arbor, Michigan and spent her childhood living in Holland; Istanbul, Turkey; Washington, D.C.; Berkeley, California; and Eugene, Oregon. After graduating from Wellesley College and spending some time as an advertising copywriter, she began writing family feature films, including Angels in the Outfield and Made in America. She is the author of the New York Times bestsellers Counting by 7s and Short, among other novels.
Meg Wolitzer was born in Brooklyn, New York, grew up in the town of Syosset, on Long Island, and sold her first novel, Sleepwalking, while a senior in college. She is the New York Times-bestselling author of numerous novels for adults, including The Interestings, The Ten-Year Nap, The Wife, and The Female Persuasion; the young adult novel Belzhar; and the middle-grade novel The Fingertips of Duncan Dorfman.

From two extraordinary authors comes a moving, exuberant, laugh-out-loud novel about friendship and family, told entirely in emails and letters.
Avery Bloom, who's bookish, intense, and afraid of many things, particularly deep water, lives in New York City. Bett Devlin, who's fearless, outgoing, and loves all animals as well as the ocean, lives in California. What they have in common is that they are both twelve years old, and are both being raised by single, gay dads.
When their dads fall in love, Bett and Avery are sent, against their will, to the same sleepaway camp. Their dads hope that they will find common ground and become friends--and possibly, one day, even sisters.
But things soon go off the rails for the girls (and for their dads too), and they find themselves on a summer adventure that neither of them could have predicted. Now that they can't imagine life without each other, will Bett and Avery (who sometimes call themselves Night Owl and Dogfish) figure out a way to be a family?