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Every woman has felt it. The unease. Walking alone.Thirty years ago, the Towpath Prowler turned the Leeds & Liverpool Canal near Skipton into every woman’s nightmare. Eight attacks. One woman never found. He’s been locked away ever since.

A viral video. A copycat predator. And the only man with answers is a monster.THE COPYCATWhen a true-crime YouTuber documents the thirty-year-old cold case, his video explodes overnight.

Days later, a young woman is attacked on the same lonely stretch of towpath. Then another.

Same hunting ground. Same methods. And the attacker knows details that were never made public.

The Prowler is back. Except he can’t be.

THE MONSTERTyrone Dupas is serving life in a high-security psychiatric hospital, and that’s where DCI Frank Finnegan must go to understand the man who made the canal his hunting ground.

Dupas will talk—for a price. A fine cigar. A little respect. A game only he knows how to play.

THE BAITWith suspects stacking up and no DNA match, DI Prisha Kumar goes undercover—a woman alone on a narrowboat, moored on the Prowler’s favourite dark stretch of water.

The plan is simple. Lure him out.

One caged monster. One copycat. One decoy.Lock Keeper is Book 13 in the DCI Finnegan Yorkshire Crime Thriller series—fast-paced murder investigations starring Finnegan and his team, set in Whitby and across North Yorkshire.

Read it today. But don’t read it alone.

488 pages, Kindle Edition

Published September 26, 2026

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About the author

Ely North

37 books36 followers
Ely North writes British crime fiction the way his detectives drink—steadily, seriously, and with the occasional lapse in judgement.

He is the author of the DCI Finnegan Yorkshire Crime Thrillers and the DI Prisha Kumar Yorkshire Cold Case Mysteries, fast-paced police procedurals set in Whitby and across North Yorkshire. His books have amassed tens of millions of pages read on Kindle Unlimited, with readers across the UK, US, Australia, Canada, Europe and beyond.

Ely writes about Whitby because it is the most beautiful and atmospheric place he knows—and he has never trusted anywhere that pretty.

At the centre of the DCI Finnegan series is Frank Finnegan—old, old-school, and not remotely bothered about either. Raised on The Sweeney and seventies cop shows, he still thinks Regan and Carter had the right idea about most things. Finnegan doesn't have much time for procedure, feelings or technology. He'd rather get on with the bit that matters—catching the bastards.

The setting matters almost as much as the murders. Whitby brings the harbour, the abbey, the 199 Steps, sea fret rolling in off the North Sea, cobbled streets, narrow alleys and hidden-away yards. Bodies are supplied courtesy of Ely. Readers have been known to follow the investigations on Google Maps, and a few have even booked holidays inspired by the books. None, so far, have been found unresponsive on the beach—touch wood.

Ely doesn't write cosy crime, but neither does he dwell on gore for the sake of it. He writes about coppers who are good at their jobs and bad at most other things, villains who believe they're the hero, and the kind of gallows humour that gets you through a twelve-hour shift—or a long-running series.

If you grew up with Taggart, Morse, Columbo, Heartbeat and The Professionals, and have spent the years since wondering where all the proper coppers went, you may just have found them.

When he isn't killing people on paper, Ely cooks. Badly, according to his wife. Enthusiastically, according to him. The cats—of which he has none—have refused to comment, as have his daughters, of which he has two.

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5 stars
260 (77%)
4 stars
64 (19%)
3 stars
9 (2%)
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Displaying 1 - 8 of 8 reviews
Profile Image for MRS KIM V BARCLAY.
99 reviews1 follower
October 21, 2026
love it

Love this series keeps you thinking till the end. Can’t wait for t
He next one to come out. Brilliant
Profile Image for Kaye.
62 reviews1 follower
October 20, 2026
This is the 13th book of the DCI Finnegan series and I think it’s the best yet! A great story, with excellent characters at a great pace too!

Can’t wait for number 14!
1 review
Read
October 19, 2026
Another winner from Ely North. The characters are great.
7 reviews
October 5, 2026
Brilliant

I can’t believe I’ve come to the end of the series for now.Ive just discovered Ely North and have read all 13 one after the other. I .love the characters which is the most important thing for me ,the settings and excellent stories that didn’t get same at all.Ill really miss Frank Prisha and Zac .Not forgetting Dinkel ,I have a real soft spot for him.
399 reviews4 followers
October 27, 2026
I think this series has gotten better and better! There have been inconsistencies in the development of the characters, but it seems like the author has figured it out. I look forward to Frank and the gang returning.
Profile Image for Les Pickersgill.
6 reviews
October 6, 2026
Intriguing

Another intriguing case for Frank and the team.. Kept me gripped from start to finish. Looking forward to the next book.
Profile Image for M R B Davis.
761 reviews5 followers
October 9, 2026
Intriguing

A copycat serial killer and good police work ensure he his put away. A thirty year old mystery is resolved and the one nobody suspected gets his just deserts. But why?
764 reviews4 followers
October 24, 2026
Frank and team get it done

they get on a case of a serial killer. it takes them to the edge of sanity. do they finally figure it out
Displaying 1 - 8 of 8 reviews