There is only one book worth reading in my opinion: One Up on Wall Street.
It's short and no other book even comes close to it for honesty, correctness and good sense. Also, it is written by the second most successful investor of all time, Peter Lynch.
The Intelligent Investor has some good technical content, but the book is dated and a lot of it is irrelevant to the modern investment environment. When I was younger I used to ready books like this and when a friend of mine asked for investment advice. I said "Look at stocks with a PE ratio of 5-10". A few days later he comes back to me and says "There are none". Right. That pretty much sums up the problem with the I.I. Graham himself in interviews during the 1970s said that his book was obsolete and he no longer recommended those methods.