I don't have it, but The Swiss Cookbook (Hippocrene International Cookbooks) by Nika Standen Hazelton gets good reviews, as does the Little Swiss Cookbook by Jacqueline Martinet. Both can be had in used hardcover very cheap through Amazon. Search SWISS COOKBOOK in Amazon's book section. I do not know about illustrations in either. Nor do I know about illustrations in Schweizer Küche. Swiss Cooking - Cuisine Suisse, which is written in three languages in one book, also very cheap used through Amazon.
There's another "Swiss Cookbook," this one by Betty Bossi, that does have lots of photos. It's also available through Amazon but NOT all that cheap.