Arthur, Donna and the Magic Crown of Tiabora: Arthur, Donna and the Magic Crown of Tiabora

The small quiet town of Brandon, Massachusetts, erupts with a baffling series of strange and bizarre criminal occurrences. The series of burglaries, poisonings, UFO sightings, and the burning of the junior high school by an arsonist who escapes capture by taking flight through the air stymies the authorities. Desperate for answers, and under intense pressure from the mayor and townspeople, Sheriff Blodgett finds himself tangled in a web of seemingly unsolvable mysteries.

It isn't until two juveniles --Donna, 13, and her brother Arthur, 11--begin investigating the weird incidents that the pieces of the puzzle begin to merge together, resulting in Donna and Arthur themselves being caught up in a mesh of danger, mystery and intrigue when they attempt to expose the identity of the stranger clothed in black who is holding the small town in a grip of terror.

Guided by their grandparents, they embark upon an unusual journey to the legendary island of Tiabora, where they encounter a mystical adventure of harrowing and frightening confrontations. It is there on the enchanted island and at the risk of their lives that they discover the true identity of the stranger in black.