Book to read on the plane

My flight to US is tommorow so I am looking for a good book to read on the plane.Anything works as longs as its informative and somehow gives my brain a challenge.

The Man Who Tasted Shapes

Everyone Poops

The Martian. Good fast read. Soon to be a movie so you can be that guy that talks about how much better the book is than the movie.

How about your CFA materials? If you are just looking for something that will make you think why not kill two birds with one stone.