SpongeBob is hall monitor at Mrs. Puff's Boating School, but he takes his authority out of the school yard, and past it down to the unsuspecting citizens of Bikini Bottom. His actions will never be the same! Includes black and white illustrations, the SpongeBob theme song lyrics, and an author profile.
At Mrs. Puff's Boating School, it is time to select the hall monitor for the day. Mrs. Puff notices that SpongeBob is the only student who has yet to serve as hall monitor. After desperately attempting to find another candidate, she is forced to hand down the hall monitor role to him.
After being elected as Boating School hall monitor, SpongeBob gives a very long speech, which ends up lasting the entire school day, and also his entire time as being the hall monitor. Out of sympathy, Mrs. Puff allows SpongeBob to at least keep on his uniform until the next day.
However, SpongeBob goes above and beyond the call for duty, and decides to become the hall monitor of Bikini Bottom, with disastrous results. His actions include giving directions to traffic, resulting in a massive pile-up, and attacking a couple in a disguise of the Open Window Maniac, with the intention of showing them the dangers of leaving a house window open.
Later, SpongeBob finds Patrick eating a strawberry ice cream cone, which drips onto the ground, and then SpongeBob labels him as a criminal. Then, a newspaper boy comes up to SpongeBob and Patrick to give them the newspaper title "Maniac strikes Bikini Bottom." SpongeBob looks at the paper's headline alerting about a maniac causing trouble around town, but as a plot twist, it was himself. SpongeBob suggests they stop this maniac and turns Patrick over a new leaf as a deputy.
They end up getting some ice cream at the eponymous parlor twice (Patrick's idea of a scandal), and then decide to split up to find the maniac, communicating using walkie-talkies. Two policemen ask Patrick if he's seen the maniac, and show him a picture of SpongeBob, which he at first mistakes the image for the actual maniac, but fails to recognize this as himself. Soon, night suddenly falls and Patrick gets frightened. He sees SpongeBob in the distance across the street, who he recognizes as the maniac but not as SpongeBob.
He alerts SpongeBob to this through his walkie-talkie, and SpongeBob attempts to escape the maniac. Everywhere he goes, Patrick tells him the maniac is there, making SpongeBob believe that the maniac is following him, but in reality, this isn't the cast. Eventually, SpongeBob sees a wanted poster for himself and realizes that he, himself is the maniac.
The police arrive to arrest him, but Mrs. Puff appears to explain the situation to them, revealing that he is her responsibility. The police interpret this as taking responsibility for the crimes, so Mrs. Puff is the one who ends up arrested.
The next day, she is working with the whole class on their essay while being recorded on TV until she tells SpongeBob that he needs to see her after class, six months from then.
The cover shows SpongeBob in his hall monitor uniform, standing confidently, holding his walkie-talkie while doing his solute position. The lamp post in the background is shining where he is and it is night time on the cover. There is road on the ground where Spongebob is standing. Patrick can be seen on the right of the cover, wearing an ice cream cone on his head and holding a wanted poster of SpongeBob, looking scared.