2.5

While the theories and the ideas are communicated in a straightforward manner, a significant portion of the book was not entirely relevant to the topic of investing. 

The stock-picking strategy preached in this book seems rather far fetched to me, relying on randomly finding a great company, and then sitting around forever to wait for it to go on sale. Good luck with that.

Further strategies such as options are mentioned but subsequently completely ignored. In addition, there is little to no evidence provided that this investment strategy works reliably, as the author makes a single investment.