Couple more for those that invest in managed funds (or any sort of share investing for that matter):

-- Common Sense on Mutual Funds by Jack Bogle (founder of Vanguard)
-- The Intelligent Asset Allocator by William Berstein
-- A Random Walk Down Wall Street by Burton Malkeil

These 3 are well respected classsics and a good read as well. They will certainly make you think twice about the funds your investing in or thinking of investing in.

And for those that are more hard-core:

-- The Intelligent Investor by Ben Graham (who taught warren buffet - bit of a dry read though but clasic stuff)
-- Contrarian Investment Stratgegies by David Dreman (if you don't like the efficient market ideas)

Jason.