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Author Dean Koontz has written more than 100 books - including thirteen number one bestsellers.
"You're incredibly prolific," says CBS' Anthony Mason. "Where does that come from?"
"The imagination's a muscle partly. And the more you use it the easier it becomes," says Koontz.
His success - he ranks number six among the world's best-paid writers - has built him a stunning California home he calls "Amazing Grace," with carved book cases in his library.
Interview transcript and video available at CBS News' Sunday Morning