Avery (Night Owl) is bookish, intense, likes to plan ahead, and is afraid of many things. Bett (Dogfish) is fearless, outgoing, and lives in the moment. What they have in common is that they are both twelve years old, and their dads are dating each other.
Bett and Avery are sent, against their will, to the same camp for the summer vacation. Their dads hope that they will find common ground and become friends - and possibly, one day, even sisters.
Against all odds, the girls soon can't imagine a life without each other. But when the worst happens, and their dads break up, Avery and Bett must figure out a way to get them to fall in love again. Is keeping a family together as easy as they think it is?
From two extraordinary authors comes this moving, exuberant, laugh-out-loud novel about friendship and family, told entirely in emails and letters.