The Vandemark Mummy is a departure from Voigt's other fiction in that the mystery is more important than social themes or well developed characters.

The thread between this novel and Voigt's others is Phineas's strength, courage, wit and wisdom. On a less serious note than in the other novel's, this young woman exhibits the same high-minded traits that make all Voigt's heroine's admirable role models.

Another ghost story in which a pair of unlikely sleuths pursue a mummy is Blossom Culp and the Sleep of Death.

Adding an element of suspense to this comedy of manners about small town, USA, the ghost story links socially outcast Blossom Culp with handsome and wealthy Alexander Armsworth.

Together these two freshmen, blessed with psychic powers, must find the missing mummy of a 3,500-year-old Egyptian princess and return it to her tomb, or face an ancient curse.