Author Don Winslow wrote on stakeouts, worked as private investigator to capture Calif. drug culture in new book 'The Kings of Cool'

You may have heard of the new Oliver Stone's movie "Savages," about two drug-dealing friends who must fight to save the woman they both love from a Mexican cartel.

The movie itself is adapted from a widely praised crime novel of the same name, written by Don Winslow. For more than a decade he has been researching and writing about the war on drugs and drug culture. To get the story, he worked as a private investigator and then for the State Department, even writing parts of his book while on stakeouts.

His research was compiled in his new book, "The Kings of Cool," which is a prequel to "Savages." Winslow explains on "Starting Point" how he was inspired to write the books.