I'm always reading one non-fiction book and one fiction book. It's amazing how often I end up reading similar ones at the same time. Right now I'm reading Andy Weir's The Martian, and Claire Nelson's memoir Things I Learned from Falling. Both involve a person stuck alone, trying to survive by solving practical problems in an inhospitable desert environment.
I had previously talked about reading Charlotte McConaghy's Wild Dark Shore, and can now report that it's an excellent book, highly recommend.