Popek has gathered quite a collection of ephemera in paging through old books—homemade invitations, tickets to a masquerade ball, a handwritten temperance pledge, an 1894 report card, and many more. I like the advertisement for Weingarten Brothers’ “erect form corsets” found in Miss Brown’s Basket, published in 1897, as well as the advertisement and information sheet for the “automatic sealing burial vault” found in 1963’s The Day They Shook the Plum Tree. Popek offers no insight into these things, he just presents them as-is, with transcriptions when necessary, and that is a good choice, though it seems another text is just waiting to be written.
And he has a blog. That’s going on the permalinks section. The book is being sold here. May have to pick this up.