Finding a genuine haunted house for a movie set sounds like fun -- and a great way to generate publicity for the Three Investigators' new detective agency. But when the boys arrive for an overnight visit at Terror Castle -- home of a deceased horror-movie actor -- they soon find out how the place got its name!

An introduction to the many kinds of chemicals, describing some of their uses to man. Includes study questions, activities and experiments.

A year ago, archaeologist Leslie MacIntyre barely survived the explosion that took the life of her fianc,̌ Matt Connolly. In the long months since, sh's slowly come to terms not only with her loss but with her unsettling new ability to communicate with ghosts, a dubious 'gift' received in the wake of her own brush with death. Now she's returned to Manhattan's historic Hastings House, site of the explosion, to conquer her fears and investigate a newly...

The Three Investigators look into a rumor of poisoning in a fast-food chain.

The goal of this study is to relate coalbed methane occurrence and producibility to geologic and hydrologic settings, leading to models for exploration and production.