<p>STEP INTO A UNIVERSE OF DARING ADVENTURE, THRILLING POWER, AND MULTIPLE LONDONS.</p><p>Kell is one of the last Travelers-magicians with a rare, coveted ability to travel between parallel universes, connected by one magical city.</p><p>There's Grey London, dirty and boring, without any magic, and with one mad king-George III. Red London, where life and magic are revered-and where Kell was raised alongside Rhys Maresh, the rougish heir to a flourishing empire. White London-a place where people fight to control magic, and the magic fights back, draining the city to its very bones. And once upon a time, there was Black London. But no one speaks of that now.</p><p>Officially, Kell is the Red Traveler, ambassador of the Maresh empire, carrying the monthly correspondences between the royals of each London. Unofficially, Kell is a smuggler, servicing people willing to pay for even the smallest glimpses of a world they'll never see. It's a defiant hobby with dangerous consequences, which Kell is now seeing firsthand.</p><p>Fleeing into Grey London, Kell runs into Delilah Bard, a cut-purse with lofty aspirations. She first robs him, then saves him from a deadly enemy, and finally forces Kell to spirit her to another world for a proper adventure.</p><p>Now perilous magic is afoot, and treachery lurks at every turn. To save all of the worlds, they'll first need to stay alive.</p>