Because some doors should never be opened.

New York bookseller Cassie Andrews is not sure what she’s doing with her life. She lives quietly, sharing an apartment with her best friend, Izzy. Then a favourite customer gives her an old book. Full of strange writing and mysterious drawings, at the very front there is a handwritten message:

This is the Book of Doors. Hold it in your hand, and any door is every door.

Cassie is about to discover that the Book of Doors is a special book – a magic book. A book that bestows extraordinary abilities on whoever possesses it. And she is about to learn that there are other magic books out there that can also do wondrous – or dreadful and terrifying – things.

Because where there is magic there is power and there are those who will stop at nothing to possess it.

Suddenly Cassie and Izzy are confronted by violence and danger, and the only person who can help them is Drummond Fox who has a secret library of magical books hidden in the shadows for safekeeping, a man fleeing his own demons. Because there is a nameless evil out there that is hunting them all . . .

Because this book is worth killing for.

New York bookseller Cassie Andrews is not sure what she’s doing with her life. She lives quietly, sharing an apartment with her best friend, Izzy. Then a favourite customer gives her an old book. Full of strange writing and mysterious drawings, at the very front there is a handwritten message:

This is the Book of Doors. Hold it in your hand, and any door is every door.

Cassie is about to discover that the Book of Doors is a special book – a magic book. A book that bestows extraordinary abilities on whoever possesses it. And she is about to learn that there are other magic books out there that can also do wondrous – or dreadful and terrifying – things.

Suddenly Cassie and Izzy are confronted by violence and danger, and the only person who can help them is Drummond Fox who has a secret library of magical books hidden in the shadows for safekeeping, a man fleeing his own demons. Because there is a nameless evil out there that is hunting them all . . .

Because this book is worth killing for.

Addictive, brilliantly written and utterly irresistible, The Book of Doors is the spell-binding, mind-bending, heart-pounding new adventure that is perfect for fans of The Binding, The Midnight Library and A Discovery of Witches . . .

The world of unknowable objects - magical items that most people have no idea possess powers - has been quiet for decades . . .

But three current members of a secret society have remained watchful, meeting every six months in the basement of a bookshop in London. They are pledged to protect their archive of magical items hidden away, safe from the outside world - and keep the world safe from them. But when Frank Simpson, the longest-standing member of the Society of Unknowable Objects, hears of a new artefact coming to light in Hong Kong, he sends the Society's newest member, author Magda Sparks, to investigate.

Within hours of arriving in Hong Kong, Magda is facing death and danger, confronted by a professional killer who seems to know all about unknowable objects, specifically one that was stolen from him a decade before. Magda is forced to flee, using an artefact that not even the rest of the Society knows about.

Returning to London, Magda learns hers is not the only secret being kept from the other two members. And that the most pernicious secret is about the nature of the Society’s mission. Her discoveries will lead her on a perilous journey, across the Atlantic to the deep south of the United States - not in pursuit of an unknowable object, but an unknowable person: the killer she first faced in Hong Kong. In doing so, Magda begins to understand that there are even more in the world who are chasing these magical items, and that her own family’s legacy is tied up in keeping all these secrets under wraps.

Magic has always been too powerful to reveal to the world. But Magda will learn there might be something even more powerful: the truth.

A debut novel full of magic, adventure, and romance, The Book of Doors opens up a thrilling world of contemporary fantasy for readers of The Midnight Library, The Invisible Life of Addie Larue, The Night Circus, and any modern story that mixes the wonder of the unknown with just a tinge of darkness. Cassie Andrews works in a New York City bookshop, shelving books, making coffee for customers, and living an unassuming, ordinary life. Until the day one of her favorite customers--a lonely yet charming old man--dies right in front of her. Cassie is devastated. She always loved his stories, and now she has nothing to remember him by. Nothing but the last book he was reading. But this is no ordinary book... It is the Book of Doors. Inscribed with enigmatic words and mysterious drawings, it promises Cassie that any door is every door. You just need to know how to open them. Then she's approached by a gaunt stranger in a rumpled black suit with a Scottish brogue who calls himself Drummond Fox. He's a librarian who keeps watch over a unique set of rare volumes. The tome now in Cassie's possession is not the only book with great power, but it is the one most coveted by those who collect them. Now Cassie is being hunted by those few who know of the Special Books. With only her roommate Izzy to confide in, she has to decide if she will help the mysterious and haunted Drummond protect the Book of Doors--and the other books in his secret library's care--from those who will do evil. Because only Drummond knows where the unique library is and only Cassie's book can get them there. But there are those willing to kill to obtain those secrets. And a dark force--in the form of a shadowy, sadistic woman--is at the very top of that list.