Whew, that was impossible to put down in the second half! (Clearly that's a common thread for the books I finished today...and the main reason I finished two books today.) I had never heard of the Tulsa Race Riots before and I hate that it's essentially been erased from history/books. I loved going back and forth through history and watching the stories intersect. The sense of urgency was insane; I couldn't wait to see what was happening in the other timeline. Such a powerful, tense book.