October. This is one of the peculiarly dangerous months to speculate in stocks. The others are July, January, September, April, November, May, March, June, December, August, and February.

— Mark Twain

Books

Investing & Finance Books on the Bookshelf

These two books are quite outdated when it comes to the numbers and methods (ie. mailing in to buy stocks), however the core concepts and mindset are just as relevant today as the day they were written.