I Know a Secret cover

I Know a Secret

Rizzoli & Isles • Book 12

4.22 Goodreads
(29.0K ratings)

Why You'll Love This

Two victims, no obvious cause of death, and a killer who knows exactly who's left on the list — Gerritsen makes sure you don't sleep until the last page.

  • Great if you want: a seasoned procedural duo at the top of their game
  • The experience: tightly paced with a creeping dread that builds steadily
  • The writing: Gerritsen weaves forensic detail into character without slowing momentum
  • Skip if: you haven't read the series — some depth requires the history

About This Book

When a young woman is found dead in her home—surrounded by horror movie memorabilia, her hands clasped around two disturbing objects—Detective Jane Rizzoli and forensic pathologist Maura Isles face a case with no clear cause of death and no obvious motive. As the investigation deepens, it reaches back into a high-profile murder that was supposedly settled years ago. With another body surfacing under equally chilling circumstances, the question stops being who did it—and becomes whether the right person was ever punished at all. Someone out there knows the truth, and that knowledge has made her a target.

Tess Gerritsen is at her most controlled here, weaving procedural precision with genuine dread in a way that never lets the clinical details crowd out the human stakes. The Rizzoli and Isles dynamic remains one of crime fiction's most grounded partnerships—sharp without being showy, warm without softening the darkness around them. At just over 300 pages, the novel moves with tight, purposeful momentum, and Gerritsen keeps the tension calibrated so that each revelation earns its weight rather than simply escalating for effect.