The Intelligent Investor by Benjamin Graham
The book on value investing. It's interesting to read this given how long ago it was published; I imagine it was a novel concept in 1949 but the idea that you should focus on stocks performing well in the long run over short-term movers seems...a little trite? On the whole, not bad but wouldn't recommend for anyone who is mildly familiar with the basic tenets of investment advice.
Read in 2017.