Useful and interesting information from Arnold Crane: "I just received Erwin Puts newest book LEICA PRACTICUM. Everyone needs to get this book. It is instructive-technically, historically, and philosophically. It is a MUST HAVE; it is totally readable. It is the best photography book I have seen in a number of years".
You can buy book here: http://www.imx.nl/photo/shop.html
p.s. Many thanks dear Arnold!