Best books/source to learn about investing?
SkyMarshal: Start here:http://www.bogleheads.org/ (long-term investing)http://www.tickerforum.org/cgi-ticker/akcs-www?post=5033 (day & macro trading)http://wilmott.com/categories.cfm?catid=11 (quant finance & algorithmic trading)The single most important rule in investing or trading:  don't lose money:http://infraredpress.com/http://www.rule1investor.com/http://safari.oreilly.com/9780132213080http://market-ticker.denninger.net/2008/03/pump-pump-pump-up...Some additional sources:http://fooledbyrandomness.com/http://finmath.com/Finally, 90% of finance books you can read at Borders or Barnes & Noble and not need to buy and keep as a reference.  Do that, rather than spend hundreds on them, and buy only the ones you think you'll want to reread or keep on hand for reference.