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The debut novel from J.S. Law, featuring new series lead Lieutenant Danielle Lewis, has been heralded as ‘addictively readable’ by Patricia Cornwell, ‘pacey, claustrophobic and utterly thrilling’ by Eva Dolan and ‘breathlessly plotted’ by Emlyn Rees.

Two hundred metres below the surface,
she will have nowhere to run and nowhere to hide.

A sailor hangs himself on board a naval submarine. Although ruled a suicide Lieutenant Danielle Lewis, the Navy’s finest Special Branch investigator, knows the sailor’s wife was found brutally murdered only days before.

Now Dan must enter the cramped confines of HMS Tenacity to interrogate the tight-knit, male crew and determine if there’s a link.

Standing alone in the face of extreme hostility and with a possible killer on board, Dan soon realises that she may have to choose between the truth and her own survival.

The pressure is rising and Dan’s time is running out…


Addictively readable
Patricia Cornwell
Pacey, claustrophobic and utterly thrilling
Eva Dolan
A brilliant debut. Breathlessly plotted. Deeply disturbing
Emlyn Rees
Tense, claustrophobic, and totally absorbing, this book should be on every thriller reader's radar - or should that be sonar? Absolutely superb
Matt Hilton
I recommend watching out for this exciting debut author, a former submariner who knows his subaqueous stuff and has delivered a narrative that will make anyone breathless
William Sutton, www.william-sutton.co.uk
If you want a thriller that truly works on every level then Tenacity is for you
A gripping read ... I don't remember being this captivated by a debut novel since Lee Child published Killing Floor ... A stand out read ... 5/5 is a given
A searing thriller ... The claustrophobic drama which unfolds is breathtaking ... A must read for fans of psychological crime thrillers
J. S. Law's taut crime novel oozes authenticity. I read this in a day and can't wait for the next in what will undoubtedly be an explosive series
Clare Mackintosh, author of <i>I Let You Go</i>
An impressive debut. . . Law knows what he's writing about, and it shows. The sexist antagonism of the men coupled with the cramped conditions make for gripping, entertaining reading
The Times
If Law manages to hold his course into nuclear noir, this series could go for as long as the atom-powered Tenacity
The Sun
The descriptions are vivid, the atmosphere frighteningly authentic
Shots </i>magazine<i>
Outstanding. . . Dark and intense
Crime Review
I would certainly recommend you dive in
Impressive and memorable
Literary Review
A taut, tense thriller with a fantastic female lead. . . J.S. Law is one to watch
SJI Holliday
Tenacity is absolutely brutal in its intensity and is quite easily one of the best debut thrillers of 2015
Gritty, super-charged with tension and claustrophobically atmospheric, Tenacity is a real page-turner of a read. . . Highly recommended
A searing thriller. . . The claustrophobic drama which unfolds is breathtaking. . . A must read for fans of psychological crime thrillers
Gripping from the very beginning. . . Cleverly constructed, dramatic and tense, it leaves you feeling shocked yet wanting more
In his debut novel, J.S. Law has crafted a thrilling suspense . . . Law ends Tenacity with a perfect segue into a sequel. It can't come too soon
Marilyn Dahl
I was gripped from the nail-biting opening chapter right through to the end
Promoting Crime Fiction

Lieutenant Dani Lewis