If you aren't looking into particular types of investments and just want a general book, The Richest Man in Babylon* is a fantastic read. Definitely check that out. I personally love books that explore investment banking. My two favorites are Monkey Business: Swinging Through the Wall Street Jungle and Liar's Poker. The first one is hilarious albeit very crude.
If you want to get into stocks and/or options, check out Michael Sincere's books.
*From Amazon: 4.6 stars, 1283 reviews; #1 Books > Business & Money > Business Culture > Ethics; #17 in Books > Business & Money > Management & Leadership > Motivational; #22 in Books > Business & Money > Personal Finance
