The Hangman's Revolution (W.A.R.P. Book 2)

F.B.I. Agent Chevie Savano is trapped in a nightmare future.
Unless she can return to 19th-century London and change the course of history, millions will die.
Luckily she has Riley the boy magician and a Victorian gangster with lovely hair to help her battle two crazed villains, who have brought the military technology of the future back in time - with potentially disastrous consequences.
The stakes are higher than the hangman's noose and only Chevie can save the day. Assuming she can avoid being killed by a couple of psycho warrior-nuns first . . .

F.B.I. agent Chevie Savano is trapped in a nightmare future. Unless she can return to 19th-century London and change the course of history, millions will die.