Told in rhyme, this playful picture book tells the story of a mutant mummy bus driver and a menagerie of monster passengers who are startled one Halloween night by someone who boards their bus by mistake: a normal little boy. Told in rhyme, this playful picture book tells the story of a mutant mummy bus driver and a menagerie of monster passengers who are startled one Halloween night by someone who boards their bus by mistake: a normal little boy.