Lee Child and Andrew Child Release Chain Reaction Thriller

Lee Child and Andrew Child will release Chain Reaction on October 20, 2026, bringing Jack Reacher back in the 31st novel of the thriller series. The book reunites Reacher with General Susan Turner as they investigate a dangerous military conspiracy.

According to Collider, Chain Reaction follows Reacher after Turner, his former commanding officer from the 110th Military Police Special Investigations Unit, seeks his help with a case involving G-99 Section.

Crime Fiction Lover reported that Turner leads the Pentagon-based organization and contacts Reacher after a team member is killed during a covert mission. The investigation leads Reacher to Summertown, Colorado.

The novel places Reacher in a setting involving five major data centers and two large solar farms, according to Crime Fiction Lover. The story also introduces conflicts involving artificial intelligence, corporate espionage, and a wider conspiracy.

Collider reported that the new installment continues the relationship between Reacher and Turner, who previously appeared prominently in Never Go Back. Turner has advanced through military ranks and now holds the position of general.

The reunion gives readers another look at Reacher outside his usual solitary routine, while maintaining the character's focus on solving complex problems. Collider said the book explores the contrast between Reacher's traditional investigative methods and modern technology.

Polygon reported that the novel follows the conclusion of Reacher season 4 on Prime Video and arrives while the television franchise continues expanding with a spinoff series and preparation for season 5.

The Prime Video adaptation stars Alan Ritchson as Reacher and has helped introduce the character to a wider audience, according to Polygon. The series continues drawing material from Lee Child's long-running book franchise.

Chain Reaction marks another collaboration between Lee Child and Andrew Child after their previous joint Reacher novels. Polygon reported that Andrew Child has taken a larger role in writing the series while both brothers remain credited on the books.

The upcoming release follows 2025's Exit Strategy and is scheduled to reach readers on October 20, 2026, continuing the adventures of the former military police officer created by Lee Child.