Wednesday, January 14, 2026

Review of Rough Diamond – Rough Justice by Avien Gray




After a first kill, MI5 Agent and erstwhile photographer Cain becomes an undercover, extra-judicial killer for a secret Bureau.

Recovering from injuries sustained protecting the Royal Family, Cain embracesa new life and romance in sun-drenched Australia, leaving his past life behind.

But when tragedy strikes, he is on the move again. This time to a new career in the world of diamond dealings in Florida.

Curiosity takes Cain to the diamond world in South Africa, where his past finally catches up with him, the criminal world allies against him and he becomes a killer again.

In Cain's action-packed escapades, a spectacular betrayal takes him into the rigours of a Chinese prison where the truth about his past begins to unravel.

Aided by a loyal band of friends from the shadowy world of intelligence, he delivers his own particular brand of rough justice.

However, with enemies closing in on all sides, will Cain prevail?


⭐️⭐️⭐️⭐️⭐️ A Brutal, Brilliant Knockout of a Thriller

I’m still buzzing from the aftershocks of finishing Rough Diamond – Rough Justice. From the very first page, this book grabbed me by the collar and refused to let go — equal parts brutal, gripping, and utterly relentless. There’s no gentle easing in here; you’re thrown straight into danger, moral ambiguity, and razor-sharp tension, and the story never once loosens its hold.

The pacing is fierce. This isn’t a book that dawdles or overexplains — it barrels forward with intent, pulling you through one high-stakes moment after another. I kept promising myself I’d stop at the end of a chapter, only to find myself reading far later than planned. That kind of compulsive pull is hard to come by, and this book delivers it in spades.

Cain is a protagonist who stays with you. He’s flawed, hardened, and shaped by choices that carry real weight. Watching his transformation is uncomfortable at times — violent, morally grey, and emotionally charged — but that discomfort is precisely what makes it so compelling. Cain never asks you to excuse his actions, only to understand the path that leads him there.

The atmosphere is steeped in grit and tension. The settings feel lived-in and cold at the edges, and every exchange hums with an underlying sense of threat. The dialogue crackles with dry humour and sharp edges, offering brief moments of levity before the darkness closes back in. The violence isn’t romanticised, but it isn’t glossed over either — it’s impactful, purposeful, and carries consequence.

By the final page, I felt completely wrung out in the best possible way. Rough Diamond – Rough Justice is intense, uncompromising, and unapologetically dark, yet it never loses sight of its humanity. It’s the kind of thriller that leaves a lasting impression, lingering long after you’ve closed the book. An easy five-star read for me, and I’ll be eagerly picking up whatever comes next by this author.


This book is available on multiple platforms, so whichever is your favourite bookshop, click here.


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.

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Review of Rough Diamond – Rough Justice by Avien Gray

After a first kill, MI5 Agent and erstwhile photographer Cain becomes an undercover, extra-judicial killer for a secret Bureau. Recovering f...