Title: First Sign of Danger
Series: Haven’s Rock, #4
Author: Kelley Armstrong
Publisher: Minotaur Books
Publication date: February 17, 2026
Length: 337 pages
Genre: Thriller/mystery
Source: Review copy courtesy of the publisher via NetGalley
Rating:

New York Times bestselling author Kelley Armstrong continues the atmospheric Haven’s Rock series as Casey Duncan investigates a threat to their off-the-grid Yukon town.

Detective Casey Duncan and her husband, Sheriff Eric Dalton, are entering a new chapter of life as parents to their six-month-old baby. Their family is hidden away in the sanctuary town of Haven’s Rock where they can live safe and private lives. But when they encounter hikers too close to the borders of Haven’s Rock, they realize they’re in danger of being exposed.

When they find one of the hikers dead the next day, they realize that their paranoia was justified, but they’re no closer to finding out who these people were and what they were doing in the vicinity of Haven’s Rock. Only by tracing the hikers’ movements, as well as examining the recent behavior of their closest neighbors, the workers of a secretive mining camp, will they be able to figure out where the threat is coming from and shut it down. Otherwise, the lives of everyone in Haven’s Rock–and their safe, secure new existence–are at risk.

After seven Rockton books, a bridging novella, and three Haven’s Rock books, Kelley Armstrong delivers yet another terrific installment in what’s become one of my very favorite fictional worlds.

Set in a remote Yukon village that’s completely off the grid, the Haven’s Rock series focuses on husband and wife team Eric and Casey as they manage their little town, keep its residents safe, and solve the murders that seem to crop up every time they turn around. In First Sign of Danger, book #4, about six months have past since the events of the previous book, Cold As Hell. Which means that Eric and Casey’s baby girl is now six months old — and it’s endlessly entertaining to see this crime-busting duo juggling baby care with dealing with dead bodies, among other job-related duties.

Haven’s Rock provides shelter for those needing to disappear for a while, a refuge for those fleeing a variety of threats in their real lives. In exchange, residents give up their phones, the internet, and all contact with the outside world, and must live by the very strict rules that keep the town and its resident hidden. While the location of the town was chosen for its isolation, a shady mining camp set up shop just a few miles away soon after Haven’s Rock opened its doors, much to Casey and Eric’s dismay. And now, in First Sign of Danger, these unpleasant neighbors might be causing even more havoc than usual.

As First Sign of Danger begins, Casey and Eric stumble across a pair of hikers needing assistance. This is alarming — their area is so remote that odds are very low that anyone from the outside world would just happen to approach their town. And what if the hikers go back home and mention that they’ve run into a couple (with a baby!) out in the woods? This seemingly random encounter could mean exposure for Haven’s Rock, putting everyone there at risk.

The situation becomes even worse when one of the hikers is found dead, clearly murdered. Suspicions are immediately raised — were they truly random hikers? Are they spies connected to the mining camp? Or could they possibly be connected to Haven’s Rock itself, perhaps in pursuit of someone Casey and Eric have sworn to protect?

As with the rest of the books in the series, there are no easy answers. As Casey and Eric chase clues, the twists and turns and red herrings pile up. The mystery is complex and confusing — in all the best ways! — and the overall plot ties back with earlier events in the series, bringing together a complicated web of conspiracies and bad guys and manipulations.

Meanwhile, we get to go along for the ride as Casey and Eric do what they do best, while also handling parenthood and interacting with the broad cast of characters, who at this point feel as familiar as long-time neighbors. The author has created a unique community through these books, and simply seeing the main characters going about their days — even without murder and mayhem — is oodles of fun.

I appreciated the fact that we get through this book without horrific threats to Casey herself, other than the usual line-of-duty danger she faces due to her job. After the extreme danger of the last book, it’s something of a relief to not have her personally targeted. That’s not to imply that there aren’t high stakes here. The murder mystery is terrific, and the always-present threat presented by certain outside forces comes to a head in startling ways.

First Sign of Danger is a an excellent installment in the series. It seems to wrap up a major overarching storyline, so it’ll be interesting to see what comes next.

Sadly, the book wraps up with these heartbreaking lines:

Watch for Casey and Eric’s final Haven’s Rock adventure, coming in February 2027.

Noooooo!!! Don’t say it’s the end! If this means that Casey and Eric get to have a murder-free life from that point on and live happily ever after, I guess they really deserve it. But still, I’ll be heartbroken when it’s all over.

It’s obvious that I adore the world of the Rockton and Haven’s Rock series, and wish it could continue forever. Meanwhile, I’m happy (and not surprised) to share that First Sign of Danger is a terrific read. Once again, let me encourage anyone who hasn’t tried this series yet to pick up the very first Rockton book, City of the Lost… and be prepared to be hooked!

Interested in the worlds of Rockton and Haven’s Rock? Check out my reviews of these previous books:
City of the Lost (Rockton, #1)
A Darkness Absolute (Rockton, #2)
This Fallen Prey (Rockton, #3)
Watcher in the Woods (Rockton, #4)
Alone in the Wild (Rockton, #5)
A Stranger in Town (Rockton, #6)
The Deepest of Secrets (Rockton, #7)
Dead Letter Days (Rockton, #7.5)
Murder at Haven’s Rock (Haven’s Rock, #1)
The Boy Who Cried Bear (Haven’s Rock, #2)
Cold As Hell (Haven’s Rock, #3)

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