An ancient manuscript that leads to the Gates of Hell. A woman’s revenge for the death of her father.

When the last of the Remnant is murdered at the Sagrada Familia in Barcelona, ARKANE agent Dr Morgan Sierra is drawn into the hunt for a supernatural Key. She's joined by agent Jake Timber, who must face his own fears as they decipher clues left behind by Kabbalist scholars.

From ancient sites in Spain, to Israel and the Czech Republic, Morgan and Jake must follow the trail to the Key, while evading Adam Kadmon, a man consumed with a lust for dark power.

As the planets align, Morgan and Jake race against time to find the Key and destroy it before the Devourers and the Polluted of God emerge from the Gates of Hell to ravage the earth.

“JF Penn writes like she has the hordes of Hades after her. Fast-paced, smart, and so much fun.” Simon Toyne, International bestselling author of the Sanctus trilogy

‘Intrigue, mystery, the occult . . . a HELL of a read.’ Scott Mariani, Sunday Times bestselling thriller author of the Ben Hope series

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Reviews

“JF Penn writes like she has the hordes of Hades after her. Fast-paced, smart, and so much fun.” Simon Toyne, Bestselling author of the Sanctus trilogy

Intrigue, mystery, the occult . . . a HELL of a read.’ Scott Mariani, Sunday Times bestselling thriller author of the Ben Hope series

“The more I read of J.F. Penn's books in her ARKANE series, the more I'm loving them. She's so incredibly good at mixing history, religion, psychology, suspense, and action in the midst of her well described settings that I know I'll be back for more. What an amazing imagination she has, combined with her gift for storytelling!” Marcia K.

“Once you start this book, you will need to sit and finish it. It grabs you from the very start and doesn't let go until you finish. Ms. Penn has again given her readers (and listeners too if on audible), a fascinating story worthy of her writing skills.” Betsy

“Only Morgan Sierra (as nimbly written by Ms. Penn) could make battling demons, scuba diving in the Dead Sea, and dodging missiles look like a ride I want to go on. All in all, it is a fun, smash-em-up, edge-of-your seat thriller that will make life more enjoyable whether read all in one go (try and stop yourself) or in bits as you can sneak it in around pesky things like child-rearing and wage-earning.” Christine Myers

“Penn takes religious symbology, myth and factual history to weave a story of intrigue, action and suspense that captivates and excites.” Donna Young

“Penn has a talent for weaving real historical and religious threads with tightly spun fiction to make a totally believable narrative. Penn always does impeccable research into the settings of her stories as well, and that is again on display as she paints vivid pictures of the land and cityscapes that her heroine finds herself in.” Robert P. Billeaud

“Joanna’s attention to detail and her research into history and religion is impeccable. Once again a brilliant read.” N. Gambles

“Another brilliant book by this talented author. Great continuity and fast paced action from cover to cover.” Robert Anastasiades

“Every time I think there's no way J.F. Penn can outdo herself, she does.” John K.