"Shades of Magic" is a fantasy book series by V.E. Schwab that takes place in a universe with parallel Londons: Red London, Grey London, White London, and Black London. Each London has a different level of magic, with Red London being the most magical and Black London being consumed by it. The story follows Kell, a magician who can travel between these worlds, and his adventures as he navigates political intrigue and dangerous foes. The series features a diverse cast of characters, including Lila Bard, a cunning thief from Grey London who becomes Kell's ally. Together, they face challenges that test their abilities and their bond. The narrative explores themes of power, identity, and the consequences of magic, making it a captivating read for fans of the fantasy genre.