Ben Guterson

In this thrilling mystery from an award-winning author, Zander is determined to do whatever it takes to save his grandmother's nineteen-story out-of-this-world department store-perfect for fans of The Swifts and The Mysterious Benedict Society. Zander Olinga's grandmother is the owner of the fabled Number Nine Plaza, the spectacular nineteen-story skyscraper. The Nine, as it's called, has everything imaginable, including a...

The New York Times bestselling series returns! Zander and Natasha must reverse an evil spell threatening the Number Nine Plaza's very existence in this puzzle-bending mystery—for fans of The Swifts. Summer is in full swing at The Number Nine Plaza, the world's largest and most fabulous department store, and best friends Zander and Natasha are looking forward to weeks of...