I finished up Billions and Billions by Carl Sagan after all, though i didn't expect to. i am pretty sure it was a reread for me. It is less cohesive than some of his earlier ones but that is to be expected considering it was completed after his death. I was intriugued to read about the global warming situation 10 years ago though and how the scientific consensus is really over a decade old.
So to finish off the year for sure: 69 books, 20 of which were nonfiction.