In yet another deviation from the reading list, the second new-to-me book of 2015 was Stephen Hawking's A Brief History of Time. (Have you seen The Theory of Everything yet? No? You should. Eddie Redmayne and Felicity Jones turn in striking and moving performances as Stephen and Jane Hawking.)
I don't have a lot to see about A Brief History of Time because I'm fairly certain I didn't understand most of it beyond a general comprehension of the words on the page. Still, I don't know if I'll ever be able to watch Doctor Who again without contemplating the feasibility of time travel. However, Hawking writes in an accessible style, and although I found the science intimidating, I still enjoyed the book on the whole and might take another crack at it next year.
Up next: Not sure. Maybe The Time Machine by H.G. Wells.