The RZA talks with Kai Ryssdal about balancing hip-hop and the message of money.

Tad Friend, who wrote a New Yorker column about how his WASP parents lived without the money and prestige they'd once known, has written a book on the history of his family. It's called "Cheerful Money." He discusses it with Kai Ryssdal.

A diary written during the Great Depression by a young lawyer named Benjamin Roth is now a book edited by his son, Daniel Roth, and James Ledbetter. The editors talk with Kai Ryssdal about what the diary means for today.

John Buntin, who writes about the 20th-century relationship between organized crime and the Los Angeles Police Department in "L.A. Noir," takes Kai Ryssdal on a tour of the city's downtown and points out things that haven't changed much.

Harvard political philosopher Michael Sandel talks with Kai Ryssdal about his new book, "Justice," and the morality of Wall Street.

Journalist Peter Maass talks with Kai Ryssdal about his book, "Crude World" and the disadvantages that come with having a lot of oil.

Today's young adults have a great deal of spending power. Steve Chiotakis talks to author Kit Yarrow, whose book "Gen Buy" explores how teens and 20-somethings are spending their money and shaping retail.

Author Richard Polsky talks with Kai Ryssdal about his book, "I Sold Andy Warhol (Too Soon)," and how the art bubble popped in 2008.

Authors Nicholas D. Kristof and Sheryl WuDunn talk with Kai Ryssdal about their book, "Half the Sky," and why more aid should be targeted to women so countries can be lifted out of impoverishment.

Alain De Botton, author of "The Pleasures and Sorrows of Work," talks with Tess Vigeland about our modern relationship with work and how occupations help shape our identities.