My favourite investment books are highly (auto)biographical and as much about life as money:

1/ Reminiscences of a Stock Operator (Edwin #Lefévre)

2/ How to Trade in Stocks (Jesse #Livermore)

3/ Tape Reading and Market Tactics (Humphrey B. #Neill)

4/ A Man for All Markets (Edward O. #Thorp)

I also consider the following good sources of advice on investment:

5/ The Hare & the Tortoise read.gov/aesop/025.html

6/ The Dog & His Reflection read.gov/aesop/026.html