Sister
Sister isn't Tom's real sister at all but his small sister Annie's imaginary friend upon whom she blames all her misdeeds; or is she imaginary after all? Tom begins to have his doubts. Then there is his brother Jack whose imaginary friends take the form of the Telequark and Trogs whom he puts in his comic strips. But it's when someone interferes with Dad's computer and the grandfather clock goes crazy that the rest of the family begins to think Annie may be right. Sure enough Sister appears on the dolls' house roof and everyone looks for solutions to rid the household of this pest, something they finally achieve thanks to Jack's cartoon characters. Don't be mislead by the format: this wildly imaginative fantasy story is for middle juniors and above.