THE THIRD KNOCK

Not every door should be opened.

A former insurance investigator moves into an old Boston apartment building, hoping to leave the past behind. Then the knocking begins.

At first, she dismisses it. But when it happens again, the sound feels deliberate. By the third knock, she is being drawn toward Apartment 13—and toward an investigation she thought had been buried years ago.

A missing woman. A deadly fire. A report bearing her signature. And a hidden room inside Marr House that should not exist.

As the building’s secrets close around her, she must confront the truth behind the report she once signed—and discover what was never meant to leave the building.

The first knock could be chance.
The second is a warning.
The third is a choice.