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Investigator Kat Cromwell Mystery Books in Order

Part ofNicholas Harvey Books in Order

Browse the Investigator Kat Cromwell Mystery books by Nicholas Harvey in order, with short summaries and a reading guide to help you choose where to begin.

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Coming soonNext book: The Girl With The Cross On Her Door (2027) · Pre-order on Amazon

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Investigator Kat Cromwell Mystery books in publication order

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6 books

1

Her Last Breath At Dawn

by Nicholas Harvey

2025

A young woman’s calculated drowning in Dana Point leaves investigator Kat Cromwell and partner Hugo Fuentes facing too many apparently impossible suspects. Their search turns toward cold cases while Kat secretly pursues the truth about her fiancé’s death.

2

The One Who Ran

by Nicholas Harvey

2025

A traumatized young runaway collapses after warning that others remain in danger. Without an identifiable crime or a victim able to explain, Kat Cromwell pushes for answers, aware that someone may prefer the girl never recovers enough to speak.

3

Why She Had To Die

by Nicholas Harvey

2025

A woman’s body washes ashore in Dana Point, giving Kat Cromwell her first homicide investigation. A skeptical partner, troubling evidence about her fiancé’s death, and a concealed personal difficulty threaten her ability to solve the case.

4
New

Her Perfect Time To Die

by Nicholas Harvey

2026

A missing girl’s body appears seven years later at the place she disappeared, carefully arranged with flowers and toys. Kat Cromwell and Hugo investigate while public anger mounts and Kat’s inquiry into a crime family approaches a dangerous confrontation.

5
New

The Girl On The Last Bus

by Nicholas Harvey

2026

A bus driver reports a regular passenger missing after footage shows a stranger pursuing her. When the stranger’s connection to the Castillo crime family emerges, Kat Cromwell takes up the case despite the absence of an obvious crime.

6
Coming Soon

A blood-painted cross on a young woman’s door signals the return of a serial killer silent for nearly twenty years. Kat Cromwell and Hugo revisit an unsolved case, racing to identify the murderer before the marked victim dies.

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Richard Reis

Software engineer whose passion for tracking book recommendations from podcasts inspired the creation of MRB.

Anurag Ramdasan

Lead investor at 3one4 Capital whose startup expertise and love for books helped shape MRB and its growth.

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