LEONARDO DA VINCI & THE GUNS of COLUMBUS

This book, in the making for the last 20 years, is really two books in one: PART I of this book is about the only surviving individual gun that can be documented to Leonardo da Vinci by its unique "instant ignition" AUTOMATIC-OPENING PAN COVER, making it one of the very few of his inventions that were actually made during his lifetime.PART II of the book is about all of the guns used by Columbus when he introduced firearms into the New World. Why bring in Columbus?   Because