The Invisible Library

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What to expect

One spy. One dangerous book. One deadly mission. The first in a delightful fantasy mystery series, The Invisible Library is the astounding debut from Genevieve Cogman.

Irene must be at the top of her game or she'll be off the case – permanently . . .


Irene is a professional spy for the mysterious Library, which harvests fiction from different realities. Along with her new assistant Kai, she's posted to an alternative London. Their mission – to retrieve a dangerous book. But lo and behold, when they arrive, it's already been stolen. London's underground factions seem prepared to fight to the very death to find her book.

In this world teeming with supernatural creatures and unpredictable magic, Irene soon finds herself up to her eyebrows in a heady mix of danger, clues and secret societies. And Kai is also hiding secrets of his own. Yet failure is not an option – the nature of reality itself is at stake.

'It's a breath of fresh air' – Guardian

Continue the journey with the second adventurous title in the The Invisible Library series, The Masked City. Genevieve is also the author of the Sunday Times bestselling Scarlet - which reimagines the tale of The Scarlet Pimpernel, but with vampires, mages and magic . . .

Critics Review

  • I absolutely loved this … flavored with truly unique mythology and a dash of the eldritch. Such clever, creepy, elaborate worldbuilding and snarky, sexy-smart characters

    N.K. Jemisin, author of the Broken Earth series, including The Fifth Season
  • A dazzling bibliophilic debut

    Charles Stross, author of the Laundry Files, including The Atrocity Archives
  • It’s a breath of fresh air … with a companionable heroine in Irene, and a satisfyingly complex plot, The Invisible Library – the first of a series – is a book in which to wallow

    Guardian
  • Written in a similar vein to Deborah Harkness’s All Souls trilogy … Contemporary meets fairy-take in this novel

    Big Issue
  • Cogman writes with a vivacity and wittiness that breathes new life into the genre . . . Reminiscent of the works of Diana Wynne Jones and Neil Gaiman, Cogman’s novel is a true treat to read

    Publishers Weekly (starred review)
  • Surrender to the sheer volume of fun that appears on every page…thoroughly entertaining

    Starburst Magazine

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