Jack Reacher witnesses a woman die in what looks like a suicide. But Reacher doesn't believe in coincidences. Following the thread leads him into a web of corruption, conspiracy, and someone who really doesn't want the truth to come out. Reacher does what Reacher does.
Clean — pure action thriller.
Skip if you dislike:
Moods: Fast-Paced Gritty Relentless No-Nonsense
Tropes: Lone Wolf Wrongful Death Conspiracy Vigilante Justice
No — Reacher novels are largely standalone.
Andrew Child maintains Lee Child's style consistently.
Same character — the books are grittier and more internal.