Series
There are 3 books in the Shades of Magic series.
Published between 2014 and 2017, in the same order they are meant to be read.
A swashbuckling fantasy adventure across parallel Londons—Grey, Red, White, and Black—each with different relationships to magic. Kell, one of the last magicians who can travel between worlds, becomes entangled in a dangerous smuggling scheme that threatens all the Londons.
The Books Oracle — track the series you are partway through, and see what to read next.