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Falken

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The enemy amongst Britain's darkest hour

October 1940: As German bombs rain down on London, Michael Fernsby's war is about to become personal.

When coordinated attacks strike key military installations across Britain's south coast, Unit 317 realises they're facing a deadly new threat.

Codenamed Falken, a ruthless German operative has unleashed a network of sleeper agents and elite Brandenburger commandos with one Destroy Britain's secret intelligence apparatus from within.

As his fellow agents fall in carefully orchestrated attacks, Michael races to uncover the traitors hiding in plain sight.

But with British intelligence compromised and a traitor feeding secrets to the enemy, Michael must navigate a deadly web of deception before the saboteurs strike a crippling blow to Britain’s war effort.

From the smoke-filled streets of the London Blitz to the shadows of occupied Europe, this sixth instalment in the Fernsby's War series plunges readers into a high-stakes game of betrayal where no one can be trusted, and every choice could be fatal.

As the bombs fall and secrets unravel, Michael will discover that some wounds cut deeper than war itself.

440 pages, Paperback

Published March 26, 2025

146 people are currently reading
30 people want to read

About the author

J.C. Jarvis

19 books26 followers
J.C. Jarvis grew up in Derbyshire, England, with a lifelong fascination for history, particularly the Second World War and Tudor England.

After serving in the British Army and later working in the IT industry, he turned fully to writing, transforming a lifelong passion for history into a career as a bestselling historical fiction author.

He is best known for the Fernsby’s War Series, a sweeping World War II saga following British intelligence officer Michael Fernsby and those drawn into the hidden war of espionage, resistance, and sacrifice behind enemy lines.

The series has built a loyal international readership and is praised for its depth of research, emotional realism, and cinematic storytelling.

In addition to Fernsby’s War, Jarvis is the author of the John Howard Tudor series and the origin novel Defying the Reich, which tells the powerful early story of fan-favourite resistance heroine Mina Postner.

When not writing, J.C. continues to research obsessively, always chasing the next story buried in history’s shadows.

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Community Reviews

5 stars
354 (78%)
4 stars
78 (17%)
3 stars
18 (3%)
2 stars
1 (<1%)
1 star
1 (<1%)
Displaying 1 - 20 of 20 reviews
Profile Image for Liora Ellington.
246 reviews20 followers
November 5, 2025
In Falken, the sixth instalment of the Fernsby’s War series, J.C. Jarvis delivers a gripping, emotionally charged World War II thriller filled with espionage, betrayal, and relentless tension. Set during the London Blitz, British agent Michael Fernsby faces his most personal and perilous mission yet hunting a ruthless German operative who has infiltrated Britain’s intelligence network.

Jarvis masterfully captures the claustrophobic fear of wartime London and the psychological strain of divided loyalties. Each twist deepens the suspense, while the human cost of deception gives the story its emotional weight.

A taut, impeccably researched thriller, Falken is a powerful exploration of courage and conscience in the face of betrayal.
Profile Image for David Mc.
275 reviews25 followers
September 7, 2025
The sixth book in this terrific Fernsby’s War Series took a different turn than the previous books, as Michael Fernsby and Unit 317 are tasked with finding a traitor in their midst. As various members of their unit are killed/assassinated in England by a highly trained team from Nazi Germany, the storyline was filled with nonstop mystery, suspense, and action. I am already looking forward to the seventh book of the series; and, then, will take a hiatus from Fernsby’s War until the eighth book is published in 2026.
3 reviews1 follower
April 6, 2025
Book 6 - The Abwehr Spy Gladius within British Intelligence

This may be the best installment so far in this series, and I’ve given each of the prior ones five stars each! Senta, Mina and Fernsby are all here, with most of the story set in Britain this time during the Luftwaffe bombings of the latter half of 1940. Sleeper cells, Nazi commandos on English soil, and a deep mole within British intelligence. Hope you enjoy it as much as I did!
153 reviews2 followers
April 7, 2025
The Hunt Continues

Fernsby's hunt for for Nazi terrorists continues. But this time the hunt is at home in England. Fallen is full of suspense. I was unable to put this book until it's conclusion. A really good read. Highly recommend this series, especially if you like WW2 espionage.
Profile Image for Nancy Branch.
6 reviews2 followers
April 16, 2025
Another Great Fernsby’s War Book

Another suburb book by J.C. Jarvis! I love the Fernsby’s War books so much. With all thats going on in the states right now, I found that I could genuinely relax and enjoy some hours in the latest great fiction found in Falken. I can’t wait for Book 7!
92 reviews
October 30, 2025
wonderful

The books get better and better. My only regret is the next one is my last. The first two books great but they ended the same. After that the books were great. They extended into the next. Left a cliffhanger. Highly recommend. No I don’t give a review telling you the book, why read it? These are great, bad Nazi all the way through. Highly recommend.
806 reviews8 followers
April 29, 2025
Great book/series

It seems like this series improves with every book. It is evident that so much research has gone into these books. The characters are wonderful. The plot is very moving. Can't wait for the next book in series.
1 review
May 17, 2025
Delightful and intense reading

I’ve read each of Jarvis’ books. I’ve loved them all. Jarvis is a gifted writer who uses words and intrigue to engage the reader. I can hardly wait for the next volume to come out.
1 review
May 17, 2025
Fernsby’s War book 6

Excellent, edge of the seat stuff. The whole book range has been exciting, very well written and a reminder of the horrors committed by our former enemy’s (now friends) just 80 years ago.
2 reviews
August 18, 2025
the very best of the series

… book 6 is the best of the series … it’s rich n pure with romance and actions …hauntingly enduring with wordless emotions …
Could not put it down …
… will most likely read again !
7 reviews
April 14, 2025
Wonderful

All the words will grab you and hold you pinned to every page from the very fist page to the conclusion.
9 reviews
April 16, 2025
It was worth the wait. Excellent writing. Unfortunately have to wait for the next one. I hope he continues with the series.
Profile Image for Melanie Underwood.
243 reviews5 followers
April 18, 2025
Another amazing installment in this wonderful, page-turning series. The best one yet.
6 reviews
May 17, 2025
Action and intrigue

Taking place on British soil this book gives the reader an uncomfortable feeling as members of unit 317 are in mortal danger. A real nai biter.
5 reviews
May 31, 2025
Excellent 6th 📖

Thoroughly enjoyed book si
x. Different, set on home soil but looking forward to reading book 7, Normandy..Great series keep it going.
3 reviews
June 22, 2025
Great Read

I really enjoy reading this series. I’m sad when I come to end of the book. Look for forward to the next book in the series!!
923 reviews
August 16, 2025
Set in England in the bombing of London and the team is being killed one by one and they have tofind who is the traitor in there midst .
The enemy is at there door and sabotage cells to track down .
For the team they have there work cut out .
The story is well written and you can almost hear the bombs drop .
Great read as always ,highly recommend
Displaying 1 - 20 of 20 reviews

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