By Avien Gray
Book Review
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Rough Diamond – Rough Justice starts off like a typical spy story, but it doesn’t stay in that lane for long. What surprised me right away is how personal it feels. Gray doesn’t drown you in technical jargon or long-winded explanations; instead, you’re dropped into Cain’s world almost the way he was—half-prepared, slightly overwhelmed, and trying to make sense of the rules as he goes.
Cain’s shift from photographer to MI5 surveillance to, well… everything that comes after, has this uneasy, snowballing energy. It’s not glamorous. It’s messy. And that’s what makes it believable. When he heads to Australia, you actually start rooting for him to stay there and just be left alone for once. Of course, the story has other plans, and the moment things go sideways, you feel it in your stomach.
The diamond-trade sections are some of the most interesting in the book—not because of the diamonds themselves, but because Gray shows the people orbiting around them: the slick operators, the liars, the ones who smile a little too easily. It’s a shiny world with something rotten underneath, and Cain walks into it like someone who already knows he should’ve turned around five miles ago.
And then the prison arc hits, and the tone shifts again. It’s heavier, slower in a deliberate way, almost claustrophobic. Cain’s been through a lot by this point, but this is where the book finally pulls back the curtain on what all that violence and secrecy has done to him internally. Instead of nonstop action, you get a kind of psychological pressure cooker that feels earned after the chaos earlier in the book.
One of the things I liked best is that Cain isn’t written as an action hero caricature. He’s competent, sure, but he doubts himself constantly, and you’re right there in his head when he second-guesses a decision or replays a mistake. His dynamic with Jerry, too, gives the story a human foothold—someone who knows him well enough to call him out but still sticks around.
The pacing never really drags, though it does shift gears a few times. Some parts feel like a thriller, others like a quiet reckoning. It works because the book isn’t trying to be a perfect formula; it’s following a man whose life has become a chain reaction.
Rough Diamond – Rough Justice is gritty, restless, and surprisingly emotional. It moves fast, but it leaves room for the bruises. If you like thrillers that focus as much on the person behind the violence as the violence itself, this one’s worth picking up.
Avien Gray
Avien Gray, the English author behind Rough Diamond – Rough Justice, brings a wealth of experience to his gripping debut novel. Born in the UK, Gray has led a dynamic, bachelor’s life marked by an impressive array of skills and global adventures. He has a driver’s license, motorbike license, and pilot’s license. His physical discipline extends to martial arts, where he earned a karate black belt, complemented by a lifelong passion for photography that captures the world through his discerning lens.
Gray’s rumoured travels paint the picture of a man unbound by borders. He is said to have spent many months in Saudi Arabia, Australia, the USA, South Africa, Europe and China. This rich tapestry of experiences infuses his writing with authenticity, lending a vivid, worldly edge to the thrilling narrative of his complex protagonist: a man called Cain.
Avien and his best friend shared a flat and went out with various female friends together. They had a great time. As it says in the book when Cain is talking with his best friend: a Royal Protection Officer.
‘We will have to write that book when we retire,’ Cain said.
They looked at each other with knowing smiles – for a long few seconds.
‘All those secrets,’ said Jerry. ‘Perhaps we will.’
And time moved on.
But in real life, his best friend tragically died – leaving Avien to write their book alone.
Social Media Links:
Twitter / X: https://x.com/aviengrayauthor
Goodreads: https://www.goodreads.com/author/show/51602430.Avien_Gray


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