Carolyn Arnold, international bestselling crime fiction author, wearing glasses and a white jacket against a dark navy background.

INTERNATIONAL BESTSELLING AUTHOR

CAROLYN ARNOLD

INTERNATIONAL BESTSELLING AUTHOR

CAROLYN ARNOLD

Addictive reads. Twisty Plots. Unforgettable characters.

Discover gripping crime fiction and police procedural series featuring strong female detectives, complex investigations, and chilling twists that keep you turning the pages.

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In the Line of Duty by Carolyn Arnold displayed beside a ringing phone on a bedside table, with the text “A Quiet Morning. A Call That Changes Everything.”

A Glimpse Inside In the Line of Duty

Nov 10, 2026

Get a glimpse inside In the Line of Duty by Carolyn Arnold, a Detective Madison Knight crime thriller where one phone call changes everything.