Nunge in the right direction

Hey, if it's not too much trouble can I get some slightly more specific information about Steampunk recs? I kind of stumbled into the genre and realized that practically every book I've enjoyed had Stempunk elements in it, so I'm asking you guys for some help.

What are some good books that are heavy on the preasence of steam machines, urban atmosphere, but in a London-esque setting? Almost like a sepia toned world, if that makes any sense.

Thanks in advance!

The wikipedia page is a reasonable place to start. As with any sort of classification scheme, there's some debate about what is and isn't steampunk, etc.

http://en.wikipedia.org/wiki/Steampunk