In 1951 the publication of J D Salinger's novel "The Catcher in the Rye" shook the free world. It paradoxically became mandatory reading on the school syllabus whilst at the same time started to become one of the most banned books. By 1965 Salinger had become a recluse and stopped publishing. Sighted as part of the motivation behind the assassination of John Lennon and other murders this book has become notorious in the world of para-political investigations.