Two cousins, Sue and Bob, visit Niagara Falls and get caught up in a mystery involving a missing scientist and a secret formula.
Author
Margaret Goff Clark
9 books in the catalog
Margaret Goff Clark has 9 books in our catalog of Christian parent reviews, mostly adventure, mystery and suspense. The titles we've reviewed span 1968 to 1985.
Recommended for readers roughly ages 8–16, based on our reviewers' age guidance.
A young girl investigates a series of mysterious events in her neighborhood after her parents leave for a trip.
Barney the bear travels to Mars and has an adventure, encountering new experiences and friends.
Barney the dinosaur travels to space and learns about planets and the solar system.
A young woman named Kathy Young disappears, and her friend investigates the mystery.
Two children, Jenny and Billy, encounter an alien spacecraft and its visitor.
Two teens, Rick and Sue, investigate a mysterious disappearance on a remote island.
A young girl discovers a mysterious horse and becomes involved in uncovering secrets surrounding its past and ownership.
Two children escape slavery and travel north to freedom during the Civil War era.
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