If you loved how Sir Maurice Newbury and Veronica Hobbes chased grisly clues through a gear-and-soot London—where secret societies meddle with forbidden devices and urban myths feel one step from reality—then you’ll relish Burton and Swinburne hunting the infamous Spring Heeled Jack amid jetpacks, bioengineered oddities, and clockwork mayhem. Like the peril around the "immorality" contraptions Newbury uncovers, the inventions here don’t just dazzle—they make trouble.

You enjoyed Newbury and Hobbes untangling murders tied to clandestine experiments and shadowy cabals; this throws you into an even knottier chase. Three unlikely investigators follow a trail of encoded invitations, masked gatherings, and a sinister “process” that weaponizes minds—much like the perilous devices that keep pulling Newbury into morally murky territory. Expect masked balls, assassins, airships, and the same headlong, puzzle-box momentum you liked in The Immorality Engine.

If Newbury’s opium-haunted compromises and willingness to bend the law for a greater truth hooked you, Cabal’s cool-blooded deal-making and ruthless experiments will scratch that same itch. Cabal barters souls and runs a demonic carnival to reclaim his research—darkly funny, brisk, and full of ingenious, awful contraptions. Where Newbury risks his conscience in service to the Crown, Cabal risks everyone else’s in service to science.

The soot-choked menace of Mann’s London—its automata, secret laboratories, and bodies left by aberrant science—finds a darker, stranger mirror in New Crobuzon. When Isaac’s experimental research unleashes a nightmare predator, the fallout echoes the disastrous consequences of the devices Newbury uncovers. You’ll get the same brooding atmosphere, morally fraught choices, and escalating dread—turned up to eleven.

If the dangerous promise of experimental apparatus in The Immorality Engine—and the terrible choices they force—fascinated you, this duel between rival Victorian magicians will land perfectly. Their obsession culminates in a machine whose results raise harrowing questions about identity, sacrifice, and what’s left behind after the trick. It’s the same provocative line between spectacle and atrocity that Newbury keeps finding behind the curtain.