A mysterious archive. A powerful enemy. And a cunning plan. The Dark Archive is the seventh book in the Invisible Library series by Genevieve Cogman.

Danger is part of the day job for a librarian-spy. So Irene’s hoping for a relaxing weekend break in Guernsey, on the tail of a rare book. That's when her jaunt takes a dire turn.

Irene is almost assassinated, Kai is poisoned and Vale barely escapes with his life. Then the attacks continue in London – targeting those connected with the Fae-dragon peace treaty. Irene knows she must stop the plot before the treaty fails. Or someone dies.

But when Irene and friends are trapped underground, in a secret archive, things don’t look so good. Then an old enemy demands vengeance, and a shocking secret is revealed. Can Irene really seize victory from chaos?

The fantastical journey continues in The Untold Story, the eighth book in the Invisible Library series.

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