Gather the daughters (Broché)

On a small isolated island, there's a community that lives by its own rules. Boys grow up knowing they will one day take charge, while girls will be married and pregnant within moments of hitting womanhood. But before that time comes, there's a tradition that offers children an exhilarating taste of freedom. Every summer they are turned out onto their doorsteps, to roam the island, sleep on the beach and build camps in trees.
And it is at the end of such a summer that one of the younger girls sees something she was never supposed to see, and returns home with a truth that could bring their island world to its knees.