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A Rebel and a Traitor: A Fugitive, the Manhunt and the Birth of the IRA.

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From the master storyteller behind 2023’s critically acclaimed KILLING THATCHER

A Rebel and a Traitor is the story of a rogue imperial consul who sought to forge a new nation in the middle of a war – and the mercurial spy chief who sought to destroy him by any means.

The rogue consul was Sir Roger Casement, a decorated diplomat who turned his back on the British empire and instead joined the rising Irish cause at the turn of the 20th century. At the book’s centre is the manhunt for Casement led by intelligence officer Reginald ‘Blinker’ Hall, the legendary British spy chief who pioneered codebreaking, early mass surveillance and media manipulation.

As he did for the critically acclaimed Killing Thatcher, master storyteller Rory Carroll has combed diaries, letters, police reports, memoirs, court transcripts, secret service archives and declassified government files in the US, Britain, Ireland and Germany to create a page-turning history, and a story that still echoes through Anglo-Irish relations. A Rebel and a Traitor raises profound questions about honour, courage and the price of patriotism.

416 pages, Kindle Edition

First published March 26, 2026

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About the author

Rory Carroll

5 books138 followers
Rory Carroll (b. 1972) is a journalist who started his career in Northern Ireland. As a foreign correspondent for the Guardian, he reported from the Balkans, Afghanistan, Iraq, Africa, Latin American, and the United States. His first book, Comandante: Hugo Chavez’s Venezuela, was named an Economist Book of the Year and BBC Radio 4 Book of the Week. He is now based in his native Dublin as the Guardian’s Ireland correspondent.

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5 stars
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53 (46%)
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Displaying 1 - 20 of 20 reviews
Profile Image for Jo Lee.
1,257 reviews29 followers
April 29, 2026
Another audio version of a book that I should have liked to have seen in print format, not that there’s anything at all wrong with the audio version, far from it, it’s meticulously researched and detailed, but I believe the written format contains maps and photographs that I would have really enjoyed getting eyes on.

An often untold story of the events that preceded the Easter Rising, and while I’d somewhat argue the title of the birth of the IRA, I enjoyed the detail (a lot of which I did already know) I really appreciated hearing extracts from Casements own diary’s.

A must read for history nerds, particularly Irish and British history.

Great narration, and had I not felt I’d missed out on the graphics I’m sure it could’ve been an easy 5 ⭐️

My thanks to HarperCollins U.K. AUDIO and NetGalley for the opportunity to review this ALC, I was late to the party and this is available now.
Profile Image for Selena.
227 reviews10 followers
March 29, 2026
The book starts with 3 men leaving a German sub in the dead of night for the southwest coast of Ireland, mid-way through WWI. A group of men prepared to die for their country, but that country is Ireland, not England. One of them is Sir Roger Casement - respected British diplomat with a strong humanitarian record overseas. But also a vocal advocate for Home Rule, devolved government in Ireland. This is the story of how an Irishman came to work for the British government, be knighted for his service, and then collude with Germany in his efforts to initiate revolution in Ireland. But Carroll superbly weaves this together with the emergence of spying and the secret service being used to great effect in wartime, society attitudes to homosexuality, the roots and events of the Easter uprising in 1916, and the seeds of the IRA.

It did take me longer to get into this book than with the author’s brilliant Killing Thatcher, I think, because I didn’t know anything about the characters involved here. But Carroll brilliantly brings them to life. (NB. My proof copy was missing maps and photographs, which I understand the final version includes - I would definitely have referred to these.) There are tragic mistakes and choices, unwavering belief, heartbreaking love stories and an epic battle of wits in the dogged, relentless manhunt for Casement, using some controversial tactics. Carroll has written another well-researched account: history in the guise of breathtaking storytelling.
Profile Image for Kim.
934 reviews29 followers
April 1, 2026
2026 has been the year of non-fiction books for me. I spent much time in World War II as written by Ben McIntyre and Jonathan Freedland and relished the opportunity to read an equally powerful account of events in and around Ireland at the time of World War I. A Rebel and a Traitor gave amazing insight into the struggles of Ireland to become independent from Great Britain. Specifically focusing on Sir Roger Casement, quite the enigma for a British diplomat, and the Navy man turned intelligence officer hunting him, Reginald ‘Blinker’ Hall.

In true cat and mouse fashion, this was a gripping back-and-forth spanning the globe from America to Germany. The Irish rising is a topic I knew little about and found the thoughtful, balanced assessment of the time and the men working toward Irish independence enthralling. Rory Carroll brought all the key figures to life with true enthusiasm easy to discern as a reader. So well researched, I couldn't put it down. The details and facts liberally woven throughout gave a true feel for the time and events as they occurred.

Though the cover says it is the birth of the IRA, to me it is more about the tactics used by the Irish early on that were then employed and expanded to cruel effect later during the troubles in Northern Ireland. This isn't specifically about the IRA though I am curious to read Carroll's Killing Thatcher as it is well regarded.

If you are on the hunt for compelling non-fiction you surely found it here in A Rebel and a Traitor. I highly recommend.
Profile Image for ash.
4 reviews
April 12, 2026
Honestly could not stop once started.

The story of Roger Casement was one I had managed to miss in my education around the easter rising and maybe more purposefully not as publicly acknowledged.

A truly intriguing man, the layers of which are peeled back beautifully by Carroll.

Looking on this past through modern eyes truly brought heartbreak and complexity. This line I felt was tread well, as tempting as it would be to see him as a sanatised martyr, morally unscrupulous and polished. The book does an amazing job of presenting how real life is rarely so spotless.

Once again Carroll does an intricate job of a cat and mouse story while fleshing out history as if it were another world. Deep research allowing me to get lost in scene and learn more details of each figure as we go.

If a book like this could be produced every month I would never tire reading the next. I feel perfectly the audience for this and was looking for something exactly like this when it released, blindsiding me.

I am glad that the excerpts from the diaries were not shyed away from while still giving a sense of how they would have been recieved at the time.


Profile Image for Jim Bowen.
1,119 reviews10 followers
May 15, 2026
I’m not really sure where to begin with this review.

Britain probably had the most widespread empire in human history. It ran from Canada to New Zealand via South Africa, the Falkland Islands and India. They say in the book that Ireland was the first place that the British conquered. I might argue it’s Wales, and that most Irish people were mildly (to very) pro British in 1912, if this book is anything to go by, but that’s by the by.

Roger Casement was any Anglo-Irish diplomat/civil Servant who travelled with the Foreign Office. He uncovered how the locals were being treated in the Congo by the Belgian king, and how poorly the poor were treated in Brazil. It was Casement who brought this treatment to the attention on a wider world, and saw change happen there when actions here taken in both countries. He was also an extremely closeted gay man who had relations with men who were much younger than him. At best there was an extreme power dynamic involved. At worst it might have been something more (the legal age for heterosexual sex in the UK was 16. We were probably looking at homosexual sex like that here, with the difference being that Casement was much older).

I feel that American Independence was lead by rich. Irish Independence was lead by poets and storytellers. The populace at large weren’t anti-English at the time this book starts. They were Catholic (the English aren’t as much). They were aware that they should probably be given more political freedoms, but if they got it within the UK, then they’d probably have accepted it. There had been some talk of an Irish Parliament, but Ulster Protestants had been helped by the army, and the great and the good to get guns, and scared the Government into backing down.

Then World War I, and the Easter Rising happened. The Germans thought if they could foment the Irish into an uprising, the rest of the UK would take their eyes off the rest of Europe, leaving the field open for them. Casement worked with this, trying to get money from the US, and arms shipments from German, so that they could start an uprising.

Reginald Hall was the head on the British spy network at the start of WWI, and he got wind of what Casement was doing, so he spent a lot of time trying to catch him. He eventually caught him in the run up to the Easter Rising. The Rising was a bit of a cluster-duck. The guns from Germany didn’t arrive. Casement, and others, were caught before it kicked off. Casement didn’t think it should even take place. Hall was of a different opinion. He let it proceed in the expectation that the British would crush it with overwhelming force, and send a message to the locals.

Hall couldn’t have been more wrong. The Irish held out longer than expected, and so many were sentenced to hang that locals were a bit “Hang on there, that’s not British”, and created a bigger pool of supporters for Irish Independence. It didn’t help that the hangings were carried out. By then the dye was cast.

So all in all, an interesting read.
242 reviews17 followers
Review of advance copy received from Netgalley
February 21, 2026
An evocative and moving story.

"A Rebel and a Traitor" opens in London in 1914. Roger Casement is set to address the Royal Commission. He is a renowned and respected diplomat and advocate for Irish home rule, but unknown to most, he is also instrumental is arming the cause, and has few qualms about what independence will cost.

The story of Casement, his past, and leading up to his fall is told in minute detail - his early days in Africa, the Congo and south America are all covered, his growing fame as a diplomat, and then his collaboration with Germany to arm the Irish are full of colourful detail and context. At the book’s centre is the hunt for Casement by intelligence officer Reginald Hall, a legendary British spy chief who pioneered codebreaking, mass surveillance and media manipulation. The story is replete with characters who assisted both Casement and Hall, and the part they played in his life.

The research that author Rory Carroll must have carried out is remarkable - he cites diaries (including Casement's own), letters, police reports, court transcripts, secret service archives and government files from the US, Britain, Ireland and Germany. In other hands this book could have been a dry re-telling of a story overlooked nowadays. Instead it reads like a thriller from Frederick Forsyth or Len Deighton.

The book is replate with photographs of Casement and many other key figures, and features a detailed chapter by chapter bibliography and notes. Highly recommended.
287 reviews2 followers
Review of advance copy received from Publisher
February 3, 2026
Author Rory Carroll has combed through countless primary sources to create a fascinating timeline of the Roger Casement's final years. The author has produced a gripping historical picture of a man whose myth has become conflated with the prevailing views of homosexuality that existed in the early twentieth century.

T.E. Lawrence (Lawrence of Arabia) intended to write his own biography of Roger Casement, hoping that "his enemies would think I was with them till they had finished reading it and rose from my book to call him a hero. He had the appeal of a broken archangel."

A Rebel and a Traitor also highlights the story of those who sought Casement's capture, providing an enlightening picture of the development of British spy craft during the First World War.

Essentially an idealist, Roger Casement saw himself very much as a rebel and not a traitor. Rory Carroll tells this complicated and very human story with nuance and sensitivity.

As a Bookseller I would highly recommend this book to those who have an interests in Irish, British and European history, spy craft, and LGBTQ+ issues.

Many thanks to the book's publishers for providing a proof copy of this book for an impartial review.
678 reviews3 followers
Review of advance copy received from Publisher
March 21, 2026
Thank you to LibroFM, Mudlark and Harper Collins for the ARC and ALC.

Let me start by saying Killing Thatcher is in my personal top ten ever and my continual handselling of this book to customers in the bookshop has led to it being in the top 5 of our best selling history books.

I was therefore very excited to read this by Rory Carroll. Because of lack of time I ended up listening to it rather than reading it and may have rated it higher had I read it. Unfortunately the subject matter didn't grip me in quite the same way and I found myself drifting in and out and not completely engrossed.

It's the story of the incorrigible Sir Roger Casement - a gentleman completely committed to the cause of indiginous people around the world and Irish Home Rule who tried to get Germany to support the Irish cause with weapons around the time of first world war. Casement was also a homosexual who was double crossed by his Norwegian mercenary lover and oddly kept very intimate diaries of his sexual encounters that would be discovered and used against him.

Profile Image for Varun Bhakay.
Author 1 book12 followers
Review of advance copy received from Netgalley
March 24, 2026
A gripping account with a somewhat misleading subtitle (the IRA is really not central to the narrative in any way), Rory Carroll exhibits once again his storytelling muscle, albeit with a greater editorial slant than was visible in "Killing Thatcher". The details are confounding, the characters a real interesting lot, and the way they come together integral to forming our understanding of Britain at the cusp of something quite unique and unforeseen till the dust had settled after the events of Easter Monday 1916.

Carroll is at his best when dealing with the complex, overwrought Sir Roger Casement, and slightly less enjoyable as a writer when dealing with the man tracking Casement - Capt Reginald Hall RN. Between the two of them, and the men and women in between, the story of Casement's role in the struggle for Irish independence is a compelling one, and Carroll does it justice.
Profile Image for Abby  AlShubaili.
12 reviews1 follower
May 11, 2026
This book is a gripping blend of history, espionage, and political drama that follows Roger Casement and Reginald Hall through the upheavals of World War I and Irish independence. What makes it so powerful is how it shows the same events from opposing angles—Casement shifting from imperial knight to condemned traitor to nationalist martyr, while Hall operates in the shadows shaping outcomes through intelligence and propaganda. It’s both fascinating and unsettling in how it reveals that “truth” and “treason” depend entirely on who controls the narrative. By the end, it doesn’t feel like a story that neatly ends, but one that continues to echo through modern politics and memory—which is why it’s hard to let go of.
712 reviews41 followers
Review of advance copy received from Netgalley
February 11, 2026
This was a wonderfully researched, objective, thorough and highly readable account of the life and death of Sir Roger Casement who transmogrified from a British diplomat and hero to a traitor for his leadership role in Irish nationalism.

His Irish background is thoroughly explored as well as the political sensitivities of the time. All sides of the argument are explored and thoroughly explained as well as there being a fascinating insight into the taboo subject of homosexuality on Edwardian Britain and the development of spy catching and the secret service in England.

A fascinating and enlightening read.
374 reviews11 followers
Review of advance copy received from Netgalley
March 2, 2026
A highly readable account of the life and death of Sir Roger Casement, a subject I knew nothing about but found fascinating. The story of Casement’s life is complex, covering his work as a British diplomat, his later role in Irish nationalism, his homosexuality in Edwardian Britain, the hunt for him by intelligence officer Reginald Hall and the work of the spy services, but it's all beautifully balanced. The whole book is based on very detailed research from a wide range of sources, but the author never lets that weigh down a very fast paced and well balanced story.

Thanks to Netgalley and the publisher for an advance copy in return for an honest review.
Profile Image for Siddhartha.
118 reviews2 followers
April 27, 2026
From the day I finished Rory Carroll’s previous book “Killing Thatcher”, I was looking forward to his next book. And after pre-ordering “A Rebel and a Traitor”, I was glad to get the copy 2 days before its market release.
Though a page-turner, it took me some time to finish the book, because I kept researching from my end on the fascinating discoveries out of it.
“A Rebel and a Traitor” is an expertly researched and utterly taut non-fiction thriller. This is class journalism. Loved it!

What are you writing next, Mr. Carroll?
Can I pre-order it right away?
Profile Image for Stephen.
2,236 reviews465 followers
Review of advance copy received from Netgalley
March 3, 2026
thanks to the publishers and netgalley for a free copy in return for an open and honest review

Interesting book about the latter part of Roger Casement's life and his journey to Germany to help Irelands cause against Britain and the lead up to his change from loyal servant to rebel. the author examines the motives of his change and events leading up to the 1916 easter rising and the hunt by intelligent forces against him.
15 reviews
May 16, 2026
I thoroughly enjoyed listening to this book. The narrator is excellent, one of the best I have listened to. The story is so well told and you really get to know the main character and feel for him, even though he was a traitor. It is a fascinating bit of Irish/British history within the context of the First World war. It was a part of history that I didn't know much about and it was very much worth listening too. I would highly recommend it.
2 reviews
April 9, 2026
I don’t generally write reviews, but happy to make an exception here. It’s a compelling story, about an era and events that shamefully I do not know enough about. But Rory combines meticulous research and (in particular) engaging description to bring it to life wonderfully. Couldn’t recommend it more - learn and enjoy at the same time.
48 reviews
May 4, 2026
Rory Carroll has a unique style of writing, he lures the reader in with great attention to detail, he sets the scene perfectly & he’s clear & concise. I’ve also had the pleasure of reading another of his books “Killing Thatcher” & I think he’s one of the best at writing nonfiction. This is an excellent book.
78 reviews
April 30, 2026
Absolutely fantastic. Not a topic I knew a huge a lot about, but excellently written non-fiction book written like a thriller. Roger Casement is a fascinating historical figure.
13 reviews
May 4, 2026
Thanks to Netgalley and Mudlark for the audiobook..
Following Killing Thatcher another goody from Rory Carroll
Sir Roger Casement, patriot or traitor?
55 reviews
May 12, 2026
A complicated history of Sir Roger Casemount and his quest for an independent Ireland. I had no idea about Germany’s role with Ireland during the 1st world war. Well researched account.
Displaying 1 - 20 of 20 reviews