My favorite steam punk novel so far is Soulless by Gail Carriger, which I reviewed a few posts back. I've finished Changeless and Blameless, too, but haven't reviewed them yet. Almost finished with The Affinity Bridge and have begun The Court of Air. Also have a copy of Boneshaker in the TBR pile. Hoping for some more interesting ideas.
Steam punk probably originated with Jules Verne. I loved Twenty-Thousand Leagues Under the Sea, Around the World in 80 Days, and Journey to the Center of the Earth when I was a kid. The steam punk concept is a mixture of Victorian and Industrial Advance during the Victorian Age.
Have you read any of these? Do you have recommendations?