In my own opinion, these books do not rise to the level of his contemporary fiction. (And yet as a general rule I much prefer steampunk.)
Perhaps this is why: Blaylock can write about places I know and things that are quite familiar to me, places and things that in my mind are distinctly unmagical, and he makes them fantastical. It's altogether likely that these books may not have the same effect on people who are not in a position when reading them to see their own personal world come alive with wonder.