Tony Hillerman, author of best-selling mysteries about Navajo detectives, on Thursday received the Mystery Writers of America's Grand Master of Crime Fiction prize.

Hillerman, 65, said he was receiving the prize "for getting old and gray and writing a lot of books."The prize, given during the Edgar Allan Poe Awards dinner in New York, "is not for any one book. It's for all of them. It's a lifetime achievement award. And being persistent," he said.