There was once a friendly ghost, by the name of Gus, who lived in an old house in the country. Mr. and Mrs. Scott and their twins, Susie and Sammy, lived there

Gus determines that ghosts needn't always wear white.

Gus and Mouse have moved into the Historical Museum, living there with Mr. Frizzle and Cora the cat. Late one night, Cora came in from a moonlit walk and said,

Gus, the friendly little ghost, is in danger of losing his home when the owners decide to have the old house demolished, but events take a different turn.

The adventures of Gus the ghost who takes a trip to Mexico.