David Brody may be well known among Westford Academy sports fans for his role as a local softball coach, but he's also gained celebrity for his book "Cabal of the Westford Knight," which he recently signed for fans at Barnes and Noble in South Nashua. 

The book, based on real life historical evidence that Westford had European visitors prior to the voyage of Columbus, portrays the tale of the mystery through the eyes of a thriller similiar to that of the DaVinci Code. 

Since it was first published several years ago, the book has gained acclaim on the Boston Globe best seller list and has brought Brody interviews with several cable channels looking to help unravel the clues potentially left behind by European visitors hundreds of years ago. 

(Clarification 3:14 p.m: Brody coaches some of the Grey Ghost varsity softball players during the summer softball season, but he is not the head coach of the Grey Ghosts varsity team.)