Penny Dreadful is Incredibly Contagious

This title features three hilarious short stories in one book: Penny Dreadful and the Best Friend, in which Penny finds herself getting on unusually well with her arch-enemy Bridget Grimes; Penny Dreadful is Incredibly Contagious, in which a case of chicken pox and the ensuing time off school mean that Penny is forced to make her own entertainment, and Penny Dreadful becomes a Tycoon, in which Penny and Cosmo devise a helmet that can expand your brain, in order to win a TV game show.