Bookseller Cassie Andrews is living an unassuming life when she is given a gift by a favourite customer – an unusual book, full of strange writing and mysterious drawings. And at the very front there’s a handwritten message to Cassie, telling her that this is the Book of Doors. What Cassie is about to discover is that the Book of Doors is a special book that bestows extraordinary powers on whoever possesses it, and soon she and her best friend Izzy are exploring all that the Book of Doors can do, swept away from their quiet lives by the possibilities of travelling to anywhere they want. But the Book of Doors is not the only magical book in the world. There are other books that can do wondrous and dreadful things when wielded by dangerous and ruthless individuals – individuals who crave what Cassie now possesses. Can Drummond Fox, a man fleeing his own demons, help them?