Raising Steam is the newest of the sprawling Discworld series of satirical comedic fantasy written by Terry Pratchett, the fortieth to be published.
If you haven’t read any of the Discworld series, you really should give it a try. It takes place on Discworld, a world that is (as you might suspect from the name) a flat disc that spins on the back of four great elephants who stand on the back of Great A’Tuin, a spacefaring sea turtle. My favorites in the series include Small Gods, Interesting Times, The Hogfather, and Feet of Clay. The series as a whole is linked only by the world, not always by characters or countries or time periods, though there are kind of sub-series within the main series that follow certain groups of characters to give them an arc. But you can read the books in pretty much any order (you’ll just appreciate some of the little things more if you’re aware of where the series has already been.
Raising Steam, like most of the books in the series, mostly takes place in Ankh-Morpork, the melting pot city-state that reminds me of a mixture of New York City and Los Angeles, ruled by the semi-benevolent demi-tyrannical Patrician.