Crux

Dan and Tamma are two Californian teenagers growing up dirt poor in the shadows of the Joshua Tree National Park, one of the world’s great rock climbing meccas. Their mothers had once been teenage waitresses and best friends until their paths diverged. Now Dan’s mother spends her days locked in her room, her dreams squandered and all her hopes pinned on getting her precociously clever son out of town and away to university.

Tamma’s mother holds no such ambition for her mouthy, snaggle-toothed, truant-pl