# Jack Reacher Returns With Susan Turner in New Book

> Jack Reacher reunites with former commanding officer Susan Turner in Lee Child's new thriller Chain Reaction.
- Title: Jack Reacher Returns With Susan Turner in New Book · Collider
- Summary: Jack Reacher reunites with former commanding officer Susan Turner in Lee Child's new thriller Chain Reaction.
- Keywords: jack reacher, lee child, chain reaction, susan turner, military police, thriller, book excerpt, new book, reunion, artificial intelligence, corporate espionage, conspiracy
- Source: Collider — https://collider.com/jack-reacher-chain-reaction-book-excerpt-sneak-peek
- Author: Chris McPherson
- Published: 2026-10-13T15:00:11+00:00
- Read time: 2 min
- Topics: jack reacher, lee child, chain reaction, susan turner, military police, thriller, book excerpt, new book, reunion, artificial intelligence, corporate espionage, conspiracy
## Jack Reacher returns
Jack Reacher, the former military police officer, has been wandering across America for nearly three decades.
## Susan Turner's return
Susan Turner, Reacher's former commanding officer, has risen to become a general in the military.
## New book release
Chain Reaction, the latest installment in Lee Child's bestselling thriller series, arrives on October 20, 2026.
## Reunion at diner
Reacher and Turner meet at a familiar diner where Turner is waiting for him.
## Shared history
Their conversation begins with easy familiarity reflecting on their time together and separate lives since parting.
## Turner's new role
Turner now leads G-99 Section, a powerful military investigative organization reporting directly to the Army's Chief of Staff.
## Mystery begins
Turner has a problem requiring Reacher's talents, involving artificial intelligence, corporate espionage, and a conspiracy.
## Reacher's skills
Reacher's old-school investigative instincts are pitted against a world increasingly dominated by technology.
## Andrew Child's role
Andrew Child, Lee Child's brother, writes Chain Reaction as his first solo outing in the series.
## Reunion details
Turner has been waiting for Reacher at a diner where she's in blue jeans and a black T-shirt.
## Turner's past help
Turner owed Reacher her first promotion after he helped prove her innocence.
## Reacher's response
Reacher says he's been living the dream without promotions, preferring the road over the army.
## Turner's command
Turner's new command, CSA G-99 Section, is a merged unit of the best criminal investigators, counterintelligence, and military police.
## G-99 Section's purpose
G-99 Section operates as a separate law enforcement operation inside the army, like the army's own FBI.
## Turner's independence
Turner reports directly to the Army's Chief of Staff but wants to remain independent from political interference.
## Reacher's help
Turner asks Reacher for help with a problem involving artificial intelligence, corporate espionage, and a conspiracy.
## Key takeaway

Jack Reacher reunites with former commanding officer Susan Turner in Lee Child's new thriller Chain Reaction.