For more details, you can download a free copy of my book, Serious Money, from my website (or purchase a hardcover copy here).

FORBES: Agonizing Over Optimal

Specifically, a well-worn hardcover copy of I Remember, the 1940 autobiography of a man named Abraham Flexner, whom few modern philanthropists have even heard of.

FORBES: Meet Warren Buffett's Secret Hero

Who, for instance, buys a digital copy of a book for their Kindle only to go out and buy a hardcover version?

FORBES: Ticket To Ride: How The Internet Fueled A New Board Game Powerhouse