One spy. One dangerous book. One deadly mission. Discover the first book in this gripping fantasy mystery series – The Invisible Library is the astounding debut from bestselling author Genevieve Cogman.

Perfect for fans of Mr Penumbra''s 24-Hour Bookstore by Robin Sloan, Jasper Fforde''s The Eyre Affair or Ben Aaronovitch''s Rivers of London.

''I absolutely loved this'' – N.K. Jemisin, author of The Fifth Season

Irene is a professional spy for the mysterious Library, whose staff are sent to different realities to harvest dangerous and mystical fiction.

Irene has been posted to an alternative steampunk London along with her enigmatic new assistant, Kai. Their mission: to retrieve a dangerous edition of Grimms'' Fairy Tales. But it has already been stolen.

In London''s underground, the laws of nature have been bent – supernatural creatures and unpredictable magic stalk the land. The city is home to vampires, werewolves – factions that are all prepared to fight to the death for this book.

Irene must face a web of deadly danger, deception and secret societies. Her new assistant is hiding secrets of his own. Yet failure is not an option – the nature of reality itself is at stake . . .

Continue the journey with the adventurous second title in the Invisible Library series, The Masked City.

Praise for the series:

''I absolutely loved this'' – N. K. Jemisin, author of The Fifth Season

''Irene is a great heroine: fiery, resourceful and no one''s fool'' – The Guardian

''Cogman keeps upping the ante on this delightful series!'' – Charles Stross, author of the Merchant Princes series