This story is about a little boy that meets 11 monsters. Each monster has something to say and the little boy's curiosity leads him in determining or decoding the monster's message. Many of his methods of decoding the monster's message results in him using his dad's things wherein he never puts them back where they belong. The monster he meets are dubbed the belly monster, the closet monster, the cookie monster, the monster of the dark, the shadow monster, the drain monster, the cushion monster, the monster under the bed, the bedhead monster, the alien, the final monster(s)...mom and dad. In all, the boy is a playful character and is "the curious monster" giving his desire to learn. Each monster's message is meant to be said in different voices to make the read interactive and fun.