The Invisible Library, by Genevieve CogmanRead about the other entries on the list.
The London visited by Library Spy Irene in the first book of Cogman’s popular series is definitely “alternate,” in the sense that it’s fairly squirming with vampires, faeries, and werewolves. The mysterious book the magical librarians have been sent there to retrieve there has already been stolen when they arrive, and Cogman has a lot of fun playing with Alternate London’s Alternate Criminal Elements, which begin a complex game of violent maneuvers to take control, giving us a deep-dive into her vision of a grim, magical city.
--Marshal Zeringue