Since 2006 John has had 37 books published by a number of different traditional publishers. Most of his books are on the engineers of World War II, but he has also written 4 novels and 4 travel books.Since 2006 John has had 37 books published by a number of different traditional publishers. Most of his books are on the engineers of World War II, but he has also written 4 novels and 4 travel books.