Sorry about that cback. Try searching 'Sauer Sohn Cate' or throw in 'Waffenstadt', and the book should show up with a double rifle depicted on the cover. It looks to be the same dealer at 'gunshowbooks.' If you weren't aware of it, you can also track down catalog reprint copies at Cornell Publications. It may not be a particularly collectable book, but likely only offered originally in a limited printing. I'd think with a little patience, a copy would show up at a better price, but something tells me you have your eye on a Sauer?