From an Amazon #1 Bestselling Crime Fiction Series!

Over a quarter of a million series copies sold.

10,000+ series ratings across all platforms – averaging 4.4 out of 5.

Three gripping investigations — where the stakes rise, the cases darken, and the truth becomes harder to uncover.

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Book 4: THE DUNES

A body buried in the sand.

A pattern no one wants to see.

A killer who isn't finished yet.

When a young woman's body is discovered in the dunes of Lytham St Annes, Walker is handed a case already under intense scrutiny.

But when more victims are uncovered, it becomes clear the past isn't buried — and neither is the truth.

With pressure mounting, Walker takes a dangerous gamble that risks everything.

It's not a holiday if you don't come home.

"Well-paced, imaginative, and utterly disturbing." — The Book Commentary

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Book 5: THE CASTLE

A body staged for all to see.

A message no one can ignore.

A mystery that refuses to stay solved.

When disturbing clues emerge from Lancaster's oldest institutions, Walker is drawn into a case steeped in history, secrecy, and public outrage.

Every lead raises more questions.

Every answer tightens the noose.

When the hunt begins, you'd better be on the right side.

"A timely and intense detective thriller." — SPR Editorial Review

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Book 6: THE WETLANDS

A body claimed by the landscape.

A place where nothing stays still.

A truth that refuses to stay hidden.

When a man is found dead in the wetlands of rural Lancashire, Walker enters a case where the terrain itself becomes part of the investigation.

What begins as routine soon fractures — revealing a disturbing reality shaped by control, obsession, and isolation.

In the wetlands, nothing stays hidden forever.

"Viscerally gripping and methodically plotted." — SPR Editorial Review