Dance of the Assassins (The Devilæs Dances Trilogy)

In London, Jack the Ripper has claimed another victim.But this "London" is a crime-free virtual city, a historical theme park for tourists. Qualified witch Roberta Morgenstern and her young police assistant, Clément Martineau, set out to solve the murder.A wild chase through the streets of old London brings them face-to-face with the terrifying new Ripper. But then they realize their true quarry is the man behind the monster: the one bringing history's most notorious villains back to life. The trail of evidence leads them from Louis XIV's Versailles through Renaissance Venice to Montezuma's Mexico, where they have a date with the devil himself.