What do you say? You have a Canon or a Nikon? Well out of respect to Leica and to broaden your vision you should buy this book. It's Leica that started photography on small format film (35 mm) and made photography accessible to the larger public. All those people shooting around with their smartphones don't realize that without Leica, photography still would be the exclusive terrain of professionals with their complex large format cameras (or so ;-).
You can order the book here. Don't wait too long. It's probably sold out fast (and no I'm not payed by Mr. Puts).