While writing Leviathan, this month's featured book, Scott Westerfeld did plenty of research on the places and time period in which the story is set. One of the nonfiction books he turned to was The 1910s Scrapbook by Robert Opie.
Opie's mini-bio, courtesy of Amazon: "Since the 1970s, Robert Opie has amassed an unrivaled collection of packaging and paper materials which are now housed in his museum of packaging in Gloucester. He is the author of numerous publications and has given many talks to schools, as well as on radio and TV." A bit more insight from his own site: "Initially, as a teenager, Robert Opie gathered together contemporary packaging, everything from cereal boxes to cigarette packs. The first item in the Collection was a Munchies pack bought by Robert on Inverness railway station in 1963, when he was 16."
Interested in imagery from the Great War and other time periods? Check out the various scrapbooks in The Robert Opie Collection.