Today I received my copy of this book through Amazon. At first sight it looks very good and interesting with a lot of information and diagrams. However I would have liked the inclusion of some visual observations and drawings, together with some nice colour photographs, even it came at an higher price.
Agreed! I haven't seen the book yet (Amazon still shows it as not being released) but I would think that a photo or a sketch of each double discussed would almost be a necessity for a book like that. I'd be willing to pay more for it as well.
I suppose you could look up each double on the internet, download a photo or a sketch of it, and then slip it into the page where it is being discussed, but it's ridiculous to need to do that.