Quick recap
Jack Reacher is hard to find, and he likes it that way. That is the official premise of Chain Reaction, the 31st novel in the series, written by Lee Child and Andrew Child and published in the US on October 20, 2026. Per the publisher's listing and Wikipedia, Reacher is in a town where a small incident becomes large. A detailed plot summary was not verified, so only the official data is given here.
