There have been a lot of billion dollar deals in the past couple days.

In his new book of essays, "But Enough About You," Christopher Buckley delves into history's forgotten billionaires.

Facebook's falling stock price has knocked the company's founder, Mark Zuckerberg, off the top 10 tech billionaires list. But he's still worth a lot.

Commentator Ruchir Sharma says just look at how its billionaires made their money.