This isn't a book I'd think to read, but when I saw it at a thrift store, I was intrigued. Being a postcard collector myself, and knowing many other postcard collectors, I knew I'd find other people who'd be interested in the subject. All of those postcards I used to skip over, I will now glance at (note that I didn't say collect). In addition to learning more about postcards, I also gained insight into France.
This helped me with research for my Novel Postcard Angel. Good descriptions and some hard-to-come-by cards. Erotic postcard modelling from Edwardian period.