Kindred is famous for being the first science fiction novel written by a black woman. That's significant, but the science fiction part of this story--the time travel--isn't what makes it so compelling.

In the 1970s, a 26-year-old black woman is suddenly pulled back through time to save the life of a young boy who grows to be a slave owner in 1800s Maryland. Yanked without warning between present and past and back again, she returns multiple times throughout his life (as only minutes or hours pass in her own), and she realizes that she must keep him alive so he can father her great-grandmother. But through this, she also must live the life of a slave and face all the indignities, hardships, and heartbreaks that come with it.

This is an illuminating look at the lives of slaves, cognizant of our modern ideas that the people who were slaves must have been tougher than people now, somehow superhuman in their ability to endure. But the wounds from the whips and chains and inhuman disregard for their lives and families were real, and Butler sensitively examines the ways in which the people were beaten and worn into submission.

Light on the sci-fi aspects (sudden unexplained time travel is the only element) and a fast, worthwhile but difficult read (due to the subject matter). Highly recommended.