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Mrs. Master Is a Disaster is the eighth book in the My Weirdest School series. 

SummaryEdit

Alexia's grandmother visits Ella Mentry Elementary School on Grandparents Day. Mrs. Master makes weird inventions for a living, but A.J. and the gang come up with the weirdest invention of all, hoping to sell it and make a lot of money. Will they succeed?

PlotEdit

TriviaEdit