SIGNED From the #1 New York Times bestselling author of The Invisible Life of Addie LaRue, and set in the world of A Darker Shade of Magic, V. E. Schwab opens a new door into perilous adventure and tangled schemes with The Fragile Threads of Power. Once, there were four worlds, nestled like pages in a book, each pulsing with fantastical power, and connected by a single city: London. Until the magic grew too fast, and forced the worlds to seal the doors be