Beware The Fish! is the third installment in the Macdonald Hall Series, and it continues to follow the two main characters Bruno and Boots along with the ensemble students of Macdonald Hall. This, along with The Zucchini Warriors, is one of the few titles in the series which didn't have a title change like the rest of the books did. And like all the other books, it received new, younger-appealing cover art and was rewritten to apply to contemporary society, economy and technology. It was written in 1980 by Gordon Korman.