Read - Linked - a young adult novel

This teen novel is a must to jump start discussions on diversity, stereotyping and privilege. Same age, same height, same grade—they could have been identical twins, but they were not. 
Yet they lived in the same imperfect world with overwhelming family
problems. Greg’s father had walked out after striking his mother. Steve’s
father refused to leave after repeatedly abusing his mother. Each boy, in his
own way, was begging for help. They lived in different homes. They had
different personalities.  One was black
and the other was white and they had switched!