Harrison Investigations book cover

The Harrison Investigations Series in Order

The Harrison Investigations series does not need to be read in order, though Haunted is the best starting point. This paranormal romantic suspense series follows Adam Harrison’s investigators as they examine haunted houses, ghostly visions, murders, and historical secrets.

🟡 Mostly Standalone · Start Anywhere

Harrison Investigations Books in Order

8 books

Complete reading order for the Harrison Investigations series.

#
Title
Date
Rating
1
Sep 2003
2
Oct 2005
3
Jul 2006
4
Apr 2007
5
Oct 2007
8
Apr 2009

How to Read the Harrison Investigations series

🟡 Mostly Standalone · Start Anywhere

Mostly standalone stories with recurring characters in a shared setting.

The Harrison Investigations books in order provide the clearest introduction to Adam Harrison’s firm and the recurring paranormal-investigation framework, but the series does not need to be read in order. Each book focuses on a separate case with its own mystery, romance, and resolution. Continuity is mainly limited to Harrison Investigations, recurring investigative connections, and the shared idea that ghosts or psychic impressions can reveal the truth behind a crime. Reading out of order should not cause confusion, though some background references will land better for readers who start earlier.

About the Harrison Investigations series

Series Premise

The Harrison Investigations series centers on cases connected to Adam Harrison’s private investigation firm. The investigators handle mysteries where supernatural activity, violent crime, and buried history overlap. Individual books feature haunted estates, ghost sightings, murder investigations, missing people, and psychic experiences tied to present-day danger.

Main Characters

Adam Harrison is the key recurring figure behind the investigation agency, though the series does not follow one fixed lead couple in every book. The books usually focus on different investigators, witnesses, victims, or local figures pulled into a paranormal case. Characters often include skeptical property owners, psychically sensitive investigators, law enforcement contacts, and people connected to old crimes or haunted locations.

Setting

The series moves between different locations rather than staying in one town. Cases include places such as a historic Virginia estate, a Scottish castle, New Orleans, New York, Florida, and other sites where local history is tied to a present threat. The changing settings give each book a separate case structure while keeping the Harrison Investigations framework intact.

Tone & Themes

The tone blends romantic suspense, ghost story, and crime investigation. Common themes include unresolved deaths, hidden family or local history, trust in psychic ability, and danger from both the living and the dead. The books often pair a developing romance with a murder or haunting that has to be explained before more people are harmed.

Is This Series Worth Reading?

The Harrison Investigations series may appeal to readers who like paranormal romantic suspense with self-contained cases. It is a good fit for readers who enjoy haunted houses, ghostly clues, investigators with unusual abilities, and mysteries where past crimes affect the present. Readers looking for one long romance or one continuous criminal investigation may find the series more case-driven.

Content Warnings and Heat Level

The series includes adult romance, suspense, murder, violence, stalking or threats, ghosts, bodies, and references to past trauma or old crimes. Heat level varies by book, but the series is written as romantic suspense rather than erotic romance. Sensitive readers should expect danger and supernatural imagery alongside the romance.

For readers searching for the Harrison Investigations series order, starting with Haunted gives the clearest introduction to the agency and its paranormal cases. The books are mostly standalone, so readers can also choose by setting, haunting, or mystery premise. Reading the Harrison Investigations books in order adds context, but it is not required to follow each story.

FAQ

How many books are in the Harrison Investigations series?

8 books

When will the next book in the series be released?

No new book is currently scheduled. The latest book, Unhallowed Ground, was published in October 2009.

When was the most recent book released?

Unhallowed Ground was published in October 2009.

What was the first book in the series?

The first book in the series is Haunted, published in September 2003.

What genre is the Harrison Investigations series?

The series primarily falls into the Paranormal Romance genre.

Do you need to read the Harrison Investigations series in order?

No, the books do not need to be read in order. Each story stands on its own, but recurring characters and the shared setting connect the series.

What is the Harrison Investigations series about?

The Harrison Investigations series centers on cases connected to Adam Harrison’s private investigation firm. The investigators handle mysteries where supernatural activity, violent crime, and buried history overlap. Individual books feature haunted estates, ghost sightings, murder investigations, missing people, and psychic experiences tied to present-day danger.

Is the Harrison Investigations series finished?

The series does not currently have a new book scheduled.