Dave Davies

When does collecting cross the line and become a disorder? And why do some people save every newspaper? Researchers Randy Frost and Gail Steketee examine compulsive hoarders in their new book, Stuff -- and explain what we know about the causes of and treatment for the compulsive disorder.

On April 4, 1968, Martin Luther King Jr. was killed on the balcony of the Lorraine Hotel in Memphis, Tenn. For the next two months, the man who shot him, James Earl Ray, was able to evade the FBI during a massive worldwide manhunt. Writer Hampton Sides traces the movements of both King and Ray in his new book, Hellhound on His Trail.

A 2009 law gives the FDA the authority to regulate tobacco products for the first time. New York Times reporter Duff Wilson, who covers the tobacco industry, explains what the ruling means -- and what impact it could have on the industry.