Four more books
I like the mix of fiction and nonfiction, though if always having exactly two-and-two gets too rigid I think changing it up would also be good.
I bought "Summer in Orcus" book on your excellent, (no plot hints) review. I'm 1/2 way through and enjoying it... I've read other books by the same author so not a real surprise. We should not have favorite book lists, but favorite author lists. Oh my.. list your 50 (or 100) favorite authors. Hmm, how to define a favorite author, maybe someone who you have read all the stuff they have written? Which leaves out many of my fav's (I've never read the "Gulag Archipelago".) And let's Harper Lee make almost everyone's list.