Books on Whiteness and being White. These books are noted as excellent resources in Freedom is a Constant Struggle by Angela Y. Davis. She recommends that all white people read them. I never have and I figure many others haven't either so the challenge is to read these books with an open heart and mind. 

This is a challenge in progress! As I find more books on the subject I might add them to the bonus section (although the main books recommended by Davis will remain the same).