Incensed by a "no tresspassing" sign, Jeff Deck launched a cross-country trip to right grammatical wrongs.
He enlisted a friend, Benjamin D. Herson, and together they got to work erasing errant quotation marks, rectifying misspellings and cutting unnecessary possessive apostrophes.
The Great Typo Hunt is the story of their crusade.
http://www.npr.org/templates/story/story.php?storyId=129086941