Chain Reaction

Susan Turner Calls in the One Man She Can Trust

Jack Reacher prefers to stay untraceable, but General Susan Turner knows how to find him. One of her team members has been murdered during a covert assignment, and suspicion reaches so deeply into the Pentagon that Turner cannot even trust her deputy. She needs an outsider who can follow the damage without leaving a bureaucratic trail.

A Remote Town Built Around Data

The assignment sends Reacher to Summertown, Colorado, an isolated place with one diner, one motel, five enormous data centers, and two solar farms humming in the dust. That strange balance of sparse local life and industrial-scale infrastructure gives the mystery an immediately uneasy setting. Whatever happened here appears larger than a single killing, and Reacher is walking into a town designed to keep its real business out of sight.

Reacher Number 31

Chain Reaction is the thirty-first Jack Reacher novel and continues the series under co-authors Lee Child and Andrew Child. The return of Susan Turner gives longtime readers a familiar connection while the new Colorado case pulls Reacher into a fresh conspiracy. Expect the series' usual mix of terse investigation, institutional distrust, and direct physical action.

The Case Opens in October

Chain Reaction is scheduled for publication on October 20, 2026, with hardback, paperback, ebook, and audiobook editions listed by the publisher. It is available to preorder ahead of release.