Librarian Spy Irene is heading into danger. Not for the first time, but could this be her last? She's tasked with a terrifyingly dangerous solo mission to eliminate an old enemy, which must be kept secret at all costs. But even more troubling news emerges.

Multiple worlds are disappearing - and the Library may have something to do with it. Determined to uncover the truth behind the vanished worlds, Irene and her friends must descend into the unplumbed depths of the Library. And what they find will change everything they know.

This may be Irene's most dangerous assignment of her hazardous career. The Untold Story is the unputdownable eighth book in the Invisible Library fantasy series by Genevieve Cogman. 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' - Guardian 'Brilliant and so much fun. Skullduggery, Librarians and dragons - Cogman keeps upping the ante on this delightful series!' - Charles Stross, author of the Merchant Princes series