Nobody mixes steampunk, werewolves, vampires, and treacle tart like Carriger. Nobody.
Series Order:
Soulless, #1
Changeless, #2
Blameless, #3
Heartless, #4
Timeless, #5
This is a concluded series, and if you pick it up now you'll be so glad you don't have to wait for Blameless!!! (My gawd Carriger knows how to cliffhanger.)
But don't mourn the end of the Parasol Protectorate; Carriger is a busy bee with multiple writing projects afoot, including a spin-off.