Cassie Andrews works at a bookstore in New York and shares an apartment with her best friend, Izzy. She leads a quiet life but feels that something is missing. Until a beloved customer brings in an old – and very strange – book. On its first page, there is a handwritten message: "This is the Book of Doors. When you hold it in your hands, every door is all doors."

Cassie will discover that it is indeed a magical book, granting amazing abilities to its holder. Soon she will learn that there are other magical books in the world, capable of doing wonderful – but also terrible – things. Where there is magic, there is power – and some will do anything to obtain it. Suddenly, Cassie, with Izzy by her side, faces violence and danger. The only one who can help them is a man trying to escape his own demons but who possesses an entire magical library hidden in the shadows…

Because this book is so precious that some would kill to possess it.

"With the skill of a magician, Brown creates a magical atmosphere that permeates even the seemingly mundane moments of the plot, while masterfully depicting the difficult themes of loss and pain. With its relentless action and quirky but lovable characters, The Book of Doors mesmerizes readers." Publishers Weekly

"A journey that opens doors to other worlds, but also to the heart of the human experience." Kirkus

"Brown’s debut is a compelling and enchanting story about friendship, about how you can shape your future, and about the mystery that life holds." Library Journal

"It will charm fans of fantasy literature and books about books themselves." Booklist

"Lush, adventurous, and entertaining. A book as magical as the values it celebrates." Stuart Turton, author of The Seven Deaths of Evelyn Hardcastle