I like 4 pillars of investing by William Bernstein.
http://books.google.com/books?id=I0iO2stKO7kC&dq=4+pillars+of+investing&pg=PP1&ots=3wKcZulm01&sig=dC8B1zx-bSrwJq1-Lt56yXOP7wM&hl=en&sa=X&oi=book_result&resnum=4&ct=result