A trainee spy. A washed-up operative.

A doomsday cult with a city to burn.

Xiu thinks her recovery mission is leading her to the middle of nowhere, but when she reaches a derelict city on the Chinese border, she finds a seasoned operative with only a pistol, twenty rounds and a broken heart.

Cut off from the rest of the world, Xiu and her new, begrudging mentor face an unimaginable enemy: a paramilitary apocalypse cult with room for two, and irradiation for two million.

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What readers are saying:

★★★★★ "I'm completely blown away by this series, one of the most amazing action stories I've read."

★★★★★ "Helix is everything I love about action and adventure novels: spies, gadgets, fights, escapes, characters you care about, and a carefully crafted story."

★★★★★ "A captivating, action-packed and suspenseful technothriller."

★★★★★ "Ambitiously, amazingly addictive. As soon as I finished this I purchased the next episode."

★★★★★ "Nathan Farrugia is back, holding his readers hostage for yet another amazing and wild ride. The characters are really brought to life on the page and in the heart."

★★★★★ "Absolutely brilliant. I've always compared Farrugia to Matthew Reilly, and with Helix I think he has finally surpassed Reilly."

★★★★★ "Helix is a fast-paced, edge-of-your-seat action-packed series guaranteed to please the most adrenaline-craving readers. Farrugia's writing is excellent, you fly through the books. I am totally emotionally invested in all the characters. A must read for all thriller fans, and sci-fi fans looking for a break from outer space."

★★★★★ "The author's signature cutting-edge technology, complex plotting, cool gadgets, three-dimensional characters and Hollywood blockbuster-style action sequences are explosively combined in this new series."

★★★★★ "This high-octane thriller by Aussie author Nathan Farrugia starts with a bang and ends the same way."

About the author

Nathan M. Farrugia is an Australian technothriller writer, and author of the USA Today bestselling Helix and Fifth Column series. Nathan is known for placing himself in dangerous situations, including climbing rooftops in Russia and being hunted by special forces trackers in the United States. He studies Systema, a little-known martial art and former secret of Russian special forces.

Beyond his army training, Nathan has trained under USMC, SEAL team, Spetsnaz and Defence Intelligence instructors, and the wilderness and tracking skills of the Chiricahua Apache scouts and Australian Aboriginals.

Nathan is currently in Malta, co-writing the sequel to the critically acclaimed video game Metro Exodus by 4A Games.

Also by Nathan M. Farrugia:

Helix #1: Helix

Helix #2: Exile

Helix #3: Interceptor

Helix #4: Anomaly

Helix #5: Inversion

Helix #6: Exclave

Helix #7: Purity

Helix #8: Kill Switch

Helix #9: Countervail

ZERO

The Chimera Vector

The Seraphim Sequence

The Phoenix Variant

The Phoenix Ascent