A Killing of Innocents: A Novel (Duncan Kincaid/Gemma James Novels Book 19)

A Killing of Innocents: A Novel (Duncan Kincaid/Gemma James Novels Book 19)

by Deborah Crombie

4.6 (3,776)

4.6 stars from 3,776 reviews. Top 62% of Contemporary Fiction books we track.


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Last checked: Jul 7, 2026

Price history: $1.99 $14.99

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Fans of these authors will like this...

  • Tana French
  • Louise Penny
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Fans of these books will like this...

  • The Lying Game
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Perfect for you if...

  • You love procedurals with smart, established detective teams who actually feel like they know each other after nineteen books.
  • You're drawn to mysteries where the victim's secrets unravel personal connections the investigators can't ignore.
  • You appreciate London as a character: Bloomsbury's streets, the task forces tackling knife crime, the institutional politics of Scotland Yard.

Maybe not for you if...

  • You need standalone mysteries without series continuity. This is book nineteen, and the team dynamics will feel richer if you've read earlier books.
  • You prefer fast-paced action over slow investigation. Crombie builds her cases methodically through interviews and connections.
  • You want a straightforward whodunit. This explores why as much as who, and the personal stakes muddy the waters.

About this book

Scotland Yard detectives Duncan Kincaid and Gemma James investigate the stabbing death of Sasha Johnson, a trainee doctor found collapsed in Russell Square on a rainy November evening. When Kincaid and his sergeant Doug Cullen arrive at the scene, Kincaid calls in his wife Gemma, who has recently joined a task force focused on the rising number of knife crimes in London. Gemma and her partner, detective sergeant Melody Talbot, join the investigation. Sasha Johnson is an unusual victim for the task force—single, successful, and career-driven, with no history of abusive relationships or gang connections. However, the detectives discover that Sasha had secrets, some of which lead them uncomfortably close to home. As the team investigates the victim's connections, a second murder occurs, raising the stakes. Kincaid, Gemma, and their colleagues must pursue the killer through the streets of Bloomsbury, even at the cost of their friendships.

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Price History

Kindle price over time. Green zones = periods when the book was free.

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Free$7.50$14.99Oct '21Feb '23Mar '25Jul '26
$1.99$14.99

Currently on sale at $2.99 — 80% off peak. Price has dropped 15 times over the last 5 years. Goes on sale roughly every 89 days. Typically stays discounted for 12 days.

Sales Rank

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#508#86,569#172,630Oct '21Aug '23Aug '25Jul '26

Currently around #29K in the Kindle store — a steady mid-list seller. Sales have softened 39% recently.

Rating & Reviews

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4.0★4.5★5.0★May '23Oct '23Jun '24Nov '25RatingReviews

Currently 4.6★ from 3,776 reviews

Gaining approximately 48 new reviews per month. Steady word of mouth growth. Rating has remained stable at 4.6 over the tracking period.

Sale Prediction

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Free$7.50$14.99Oct '21Feb '23Mar '25Jul '26PredictedJul '26

Actual Predicted

This book is currently discounted at $2.99. It typically returns to around $14.99.

Prices shown in USD from Amazon US. We continuously pull new data to improve tracking. If dates look old, it usually means there has been no significant change since the last data point.

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Deborah Crombie

1 book on Vagrant Press

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