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Persons of Interest
  • Published: 9 June 2026
  • ISBN: 9781804961421
  • Imprint: Penguin
  • Format: Paperback
  • Pages: 416
  • RRP: $24.99
Categories:

Persons of Interest

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A million-copy-selling crime writer comes into print for the first time. In the fourth book of A DC Smith / Kings Lake Investigation Series, DC Smith has solved hundreds of crimes, but he's never been accused of one. Until now.

In the peace and tranquillity of the woods at Pinehills on a Saturday afternoon, a mobile phone begins to ring. The phone belongs to DC Smith and it isn’t unusual that the call is from Kings Lake Central police station; what is unusual is the fact that he seems to be the subject of an investigation rather than taking part in one.

What can the links be between a prisoner’s violent death in another county, the disappearance of two teenagers and the highest profile case in Kings Lake for many years? As Smith and his team begin to untangle the threads, one thing becomes clear – they are dealing with some of the most dangerous people that they have yet encountered.
  • Published: 9 June 2026
  • ISBN: 9781804961421
  • Imprint: Penguin
  • Format: Paperback
  • Pages: 416
  • RRP: $24.99
Categories:

About the author

Peter Grainger

Peter Grainger is the 'creator of the greatest fictional sleuth you’ve probably never heard of' (FT magazine). A former sixth-form English teacher, Peter is the author of 23 self-published novels, 19 of which are now scheduled for release by major British and North American publishers. Peter lives with his wife, sometimes a grandson and a dog in a cottage in the Cambridgeshire fens. He travels as often as possible to the Norfolk coast he once called home.
PG

Also by Peter Grainger

A Private Investigation
Roxanne
Songbird
The Truth
On Eden Street
In This Bright Future
The Rags of Time
See all

Praise for Persons of Interest

Once I was ensconced in Kings Lake, in the company of Smith and his team, I didn’t want to leave … What sets Grainger’s books apart from the typical police procedural is the fully realised characters, who appear to live in a gentler world, on a time continuum that makes sense, progressing and evolving from book to book.

Financial Times

The books are comforting, the writing is subtle and the plots are gripping.

The Times