The Monsters' Monster is a children's book written by Patrick McDonell. It was first published in 2012.
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Once upon a time, there were three little rascals who thought they were the BIGGEST, BADDEST monsters around. Then along came an even BIGGER monster who changed their minds. And all it took was two little words.
In this playful tale from bestselling picture book author Patrick McDonnell, a very BIG monster shows three very BAD little monsters the power of boundless gratitude.