I'll give you the sun / by Jandy Nelson.

Jude and her brother, Noah, are incredibly close twins. At thirteen, isolated Noah draws constantly and is falling in love with the charismatic boy next door, while daredevil Jude surfs and cliff-dives and wears red-red lipstick and does the talking for both of them. But three years later, Jude and Noah are barely speaking. The early years are Noah's story to tell. The later years are Jude's. What the twins don't realize is that they each have only half the story, and if they could just find their way back to one another, they'd have a chance to remake their world.