3. The Ghost Map, by Steven Johnson, about an outbreak of cholera in London in the 1850s. This is the kind of book I'd like to write some day, as it's got excellent control of the material to tell a good story.
4. Alarums & Excursions #436
5. Victoriana, 2nd edition, from 2007, and dated in some interesting ways
6. The Havering Adventures, for Victoriana. I got to play in the first one a couple years ago at GenCon and am hoping to run it for the Kerberos Fate game.