I'm 25. After listening to your show, I decided, Hey, I ought to start saving for retirement, so I opened a Roth IRA. Now my question is: Is that it? Do I just put money in there and it grows? Or is this the type of thing where, once it's created, I then have to allocate the money in there to various investments? If it's the latter, what the HECK should I direct my first investments toward? Love the show, cheers! Sam, Concord, NH

You'll see a lot of top ten lists this week, including one for books. But are those page turners about to vanish?

For-profit book recycler behind popular donation program sells many of the books received.

From Paul Allen to Henry Kissinger, here's a list of some of my favorite author interviews this year

At the end of the year, Marketplace takes a look at the best business books of 2011. We asked some of our regular contributors and voices we respect to share their picks for favorite business books of the year. Plus, Kai offers his own recommendations.

Ray Bradbury's classic "Fahrenheit 451" available as e-book for first time.

The Kogi Barbecue truck is often credited with kicking off the gourmet food truck craze in Los Angeles. Chef Roy Choi shares how Jack Kerouac's seminal work pushed him to start the truck.

Author Mark Bowden discusses the botnets that are controlling millions of computers around the world, and how cyber warfare is now a part of the modern world.

Walter Isaacson talks about his new biography on Steve Jobs, and his experiences with the Apple founder.