Book 2

Murder to Go

by Megan Stine and Robert Arthur

Published 19 April 1989
The Three Investigators look into a rumor of poisoning in a fast-food chain.

Book 4


Book 5

An Ear for Danger #5

by Marc Brandel and Robert Arthur

Published 29 August 1989

Book 6


Book 6


Book 8

Shoot the Works

by William McCay

Published 24 February 1990
The Three Investigators track down a gang who are using paintball war games as a training ground for crime.

Book 10

Long Shot

by Megan Stine

Published 21 July 1990
The seventeen-year-old Three Investigators become involved in tracking down a basketball scandal when Pete receives a corrupt offer from a local college.