I'll Give You the Sun by Jandy Nelson

When tragedy tears twin brother and sister Noah and Jude apart, daredevil Jude meets an impulsive new mentor and slowly makes her way back to her shy brother, Noah, who has a knack for drawing and could never keep his eyes off the boy next door. Noah tells half the tale, while Jude chronicles the later years, with each twin holding half of a story that could change their lives for the better...if only they could see it.