Recs if you like Raising Steam ...

Discworld is a comic fantasy book series written by the English author Sir Terry Pratchett, set on the Discworld, a flat planet balanced on the backs of four elephants which in turn stand on the back of a giant turtle.

All main novels related to Discworld by Terry Pratchett

Speculative fiction stories that heavily feature trains. It's almost become its own subgenre, and there was no list for it; I thought there should be one. Happy to take recs in the comments! (I haven't read all of these. If you think a book doesn't belong on this list, leave a comment!)