Have mostly read novels this year, but when I have read non-fiction it was mostly extracts for my personal research, not necessarily cover to cover.
I will try to give a wide range:
* "The New Wild: Why Invasive Species Will Be Nature's Salvation" by Fred Pearce. A very different view of ecosystems.
* "In the Land of Invented Languages" by Arika Okrent. Very entertaining.
* "Bully Inc." by Peter Burnett
* "The Radium Girls" by Kate Moore
I have also read a lot of Biblical Pseudepigrapha and some works from the Ethiopian canon.