When FBI Special Agent Ilona Farris is posted to Seattle, she is determined to prove herself and leave her past behind. Her results and drive get her noticed and she’s drawn into a new taskforce created to investigate the cases no one else can touch—the ones that defy logic, evidence, and every known investigative pattern.

Ilona knows something about the unsolvable.
At fourteen, she lived through a nightmare that still follows her.
Now, every new case threatens to pull those buried memories back to the surface.

The FBI’s experimental Unsolvable Crimes Unit—built around a predictive A.I. known as Themis—assigns Ilona to mysteries that shouldn’t exist: cases rooted in folklore, impossible timelines, vanishing victims, and killers who hide in the places she once felt safe. From the dense forests of the Olympic Peninsula to the marinas of Puget Sound and the shadowed streets of Seattle, Ilona finds herself navigating not just evidence, but the ghosts of her own history.

In this gripping five-book collection, Ilona confronts the most disturbing cases of her career:
A boy who emerges from the Washington wilderness speaking a medieval language no child should know.
A murder victim in a Seattle marina who died—officially—twenty years earlier.
A series of deaths inside tornadoes across the Midwest that should have left no victims at all.
Murals appearing across Seattle predicting tragedies before they occur.
And long-missing victims who reappear on city streets, posed with pages from twisted fairy tales.

As the investigations tighten, Ilona faces a truth the A.I. cannot calculate: some cases don’t stay unsolved by accident. Someone is watching. Someone is manipulating events. And someone seems determined to drag Ilona into a pattern only she can recognise—one rooted in the trauma she has spent a lifetime trying to bury.

Because in Seattle, the past isn’t just resurfacing.
It’s hunting her.
And only the truth—no matter the cost—can save the next victim.

Perfect for fans of Melinda Leigh, Lisa Gardner, and Jeffery Deaver.

You get the complete series of gripping crime thrillers in this great value box set.