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"Traders, Guns & Money" by Satyajit Das (2008) is also a good book about the financial mess we are in. It focuses on derivatives and banking, however, not on the economy as a whole. Explains securitization and leverage in humorous, simple english. The book might be complementary to the I.O.U. book. For FT and other fiancial news sites, the author writes online columns. Check them out.