to answer your actual question tho:

i'm still on that noir / hard-boiled kick, so a lot of hammett, cornell woolrich, jim thompson, david goodis.

also gonna check out alex bellos's math books.
https://www.amazon.com/Alex-Bellos/e/B00K042IJC/ref=sr_tc_2_0?qid=1480437901&sr=1-2-ent

hugh thomas's epic history of the slave trade.
https://www.amazon.com/Slave-Trade-Hugh-Thomas/dp/0684810638

and threw a couple of castro books in the queue.
https://www.amazon.com/Fidel-Castro-Reader-David-Deutschmann/dp/8187496908/ref=sr_1_1
https://www.amazon.com/Prison-Letters-Fidel-Castro/dp/1560259833/ref=sr_1_1
https://www.amazon.com/Fidel-Castro-Life-Spoken-Autobiography/dp/1416562338/ref=sr_1_1