Book Review – The Dark Isle by Clare Carson #20BooksofSummer2025

About the Book

Sam grew up in the shadow of the secret state. Her father was an undercover agent, full of tall stories about tradecraft and traitors. Then he died, killed in the line of duty.

Now Sam has travelled to Hoy, in Orkney, to piece together the puzzle of her father’s past. Haunted by echoes of childhood holidays, Sam is sure the truth lies buried here, somewhere.

What she finds is a tiny island of dramatic skies, swooping birds, rugged sea stacks and just four hundred people. An island remote enough to shelter someone who doesn’t want to be found. An island small enough to keep a secret…

Format: Hardcover (380 pages) Publisher: Head of Zeus
Publication date: 1st June 2017 Genre: Thriller

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My Review

The Dark Isle is the third book in a trilogy. I haven’t read either of the first two but frankly I didn’t find myself at a disadvantage. In fact, if I hadn’t discovered it was part of a trilogy, I don’t think I’d have guessed because it comes across as a fully developed standalone story. However, because I haven’t read the previous two books my review may unwittingly contain spoilers.

The Dark Isle is a blend of spy thriller and family drama that moves back and forth between Sam’s teenage years in 1976 and 1989, some years after her father’s death. She’s now a rather penniless archaeology student working on a research proposal for her PhD and living in a grimy rundown flat with her best friend Becky in an insalubrious part of London.

Whilst spending the summer on a dig in Orkney, Sam catches sight of a figure from the past: Pierce, the father of Anna, her childhood friend who disappeared from her life fifteen years before. She and Anna spent the hot summer of 1976 together, having adventures inspired by the fables told by Sam’s father. Sam was rather starstruck by Anna, in awe of her boldness and maturity. The fact both their fathers worked in undercover roles, albeit employed by different government bodies, created a unique bond between them. Then suddenly it was all over. Anna’s father’s abandoned her and her mother and there has been no communication in the intervening years. It’s almost as if Anna wanted to disappear too.

Sam wonders why after such a period of absence, Pierce has chosen to reveal himself now, and why to her? What does he want from her? And what really happened between Pierce and her father? They’re questions to which Sam can’t resist trying to find the answers, especially because of fragments of conversation between the two men she overheard as a child during a holiday on Orkney.

In searching for answers she unwittingly places herself in danger, as a figure from both men’s past returns with some unfinished business. It leads to some tense and exciting scenes with Sam having to employ all the tradecraft of a spy in an attempt to outwit her pursuers. Not knowing who she can trust doesn’t make it any easier. All she can rely on is her own instincts, and the penknife her father Jim insisted she always carry.

I liked Sam’s transition from quirky teenage loner to slightly grungy, prickly twenty-something. And I really liked the contrast between the wild beauty of Orkney and the remote island of Hoy, and the seedy, rather grimy parts of London Sam inhabits. There’s also a great sense of each time period.

I think what the author did really well is, alongside the espionage element of the plot, give an insight into the impact on a family of someone involved in covert work: the sudden unexplained absences, the mood swings, the constant air of watchfulness, the barely suppressed aggression.

All of this makes The Dark Isle a really accomplished, well-paced thriller. The Dark Isle is book 7 of my 20 Books of Summer.

In three words: Intriguing, atmospheric, pacy
Try something similar: The Bone Road by N. E. Solomons

About the Author

Clare Carson is an anthropologist and works in international development, specialising in human rights. Her father was an undercover policeman in the 1970s. She lives in Brighton.

Connect with Clare
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#WWWWednesday – 27th August 2025

Hosted by Taking on a World of Words, this meme is all about the three Ws:

  • What are you currently reading?
  • What did you recently finish reading?
  • What do you think you’ll read next?

Why not join in too?  Leave a comment with your link at Taking on a World of Words and then go blog hopping!


I’m reading The Two Roberts on my Kindle, a physical copy of crime novel The Dark Isle and I’m listening to the audiobook of Tombland (the last two both books on my 20 Books of Summer 2025 list).

The Two Roberts by Damian Barr (Canongate via NetGalley)

He will stay like this forever, Robert’s arm draped round him. They will be forever twenty.

Scotland, 1933. Bobby MacBryde is on his way. After years grafting at Lees Boot Factory, he’s off to the Glasgow School of Art, to his future. On his first day he will meet another Robert, a quiet man with loose dark curls – and never leave his side.

Together they will spend every penny and every minute devouring Glasgow – its botanical gardens, the Barras market, a whole hidden city – all the while loving each other behind closed doors. With the world on the brink of war, their unrivalled talent will take them to Paris, Rome, London. They will become stars as the bombs fall, hosting wild parties with the likes of Lucian Freud, Francis Bacon and Elizabeth Smart. But the brightest stars burn fastest.

The Dark Isle by Clare Carson (Head of Zeus) #20BooksOfSummer25

Sam grew up in the shadow of the secret state. Her father was an undercover agent, full of tall stories about tradecraft and traitors. Then he died, killed in the line of duty.

Now Sam has travelled to Hoy, in Orkney, to piece together the puzzle of her father’s past. Haunted by echoes of childhood holidays, Sam is sure the truth lies buried here, somewhere.

What she finds is a tiny island of dramatic skies, swooping birds, rugged sea stacks and just four hundred people. An island remote enough to shelter someone who doesn’t want to be found. An island small enough to keep a secret…

Tombland by C. J. Sansom (Mantle) #20BooksOfSummer25

Spring, 1549. Two years after the death of Henry VIII, England is sliding into chaos.

The nominal king, Edward VI, is 11 years old. His uncle, Edward Seymour, Lord Hertford, rules as Edward’s regent and Protector. In the kingdom, radical Protestants are driving the old religion into extinction, while the Protector’s prolonged war with Scotland has led to hyperinflation and economic collapse. Rebellion is stirring among the peasantry.

Matthew Shardlake has been working as a lawyer in the service of Henry’s younger daughter, the lady Elizabeth. The gruesome murder of one of Elizabeth’s distant relations, rumored to be politically murdered, draws Shardlake and his companion Nicholas to the lady’s summer estate, where a second murder is committed.

As the kingdom explodes into rebellion, Nicholas is imprisoned for his loyalty, and Shardlake must decide where his loyalties lie – with his kingdom, or with his lady?

The Body in the Ice by A. J. MacKenzie (Zaffre) #20BooksOfSummer25

The Summer House Party by Caro Fraser (Head of Zeus)

The Predicament by William Boyd (Viking via NetGalley)

Gabriel Dax, travel writer and accidental spy, is back in the shadows. Unable to resist the allure of his MI6 handler, Faith Green, he has returned to a life of secrets and subterfuge. Dax is sent to Guatemala under the guise of covering a tinderbox presidential election, where the ruthless decisions of the Mafia provoke pitch-black warfare in collusion with the CIA.

As political turmoil erupts, Gabriel’s reluctant involvement deepens. His escape plan leads him to West Berlin, where he uncovers a chilling realisation: there is a plot to assassinate magnetic young President John F. Kennedy. In a race against time, Gabriel must navigate deceit and danger, knowing that the stakes have never been higher . . .