Arcadia Public Library

Horrible Harry of classroom 2B cuts back on his mischievous pranks after falling for Song Lee.

Horrible Harry and friends start off third grade with a new room and a field trip to an old copper mine to study rocks.

It's almost summer vacation and the students in room 2B are having trouble concentrating on their butterfly project, until a frightening-looking new teacher comes to supervise the Suspension Room and Harry is sent there as punishment for unruly behavior.

Doug discovers that though being Harry's best friend in Miss Mackle's second grade class isn't always easy, as Harry likes to do horrible things, it is often a lot of fun.

When Sid, his annoying third-grade classmate, ruins Song Lee's origami praying mantis, Horrible Harry plots triple revenge on the troublemaker.

When Horrible Harry's pet cat, Googer, sneaks a ride and gets into the school building, third-graders Harry and Doug have to catch him before anyone else does, which means going into some forbidden places.

Inspired by his third-grade class's study of the moon, Harry announces that he is going there.

When his best friend Doug discovers his top secret hideout, Harry enlists the help of his friends' to save it from being developed into an apartment building --

"When Harry and his pals in Room 3B aren't invited to their teacher's wedding, they invite themselves, and wind up saving the day"--

Harry persuades his classmates to sneak through the playground fence during lunchtime recess to view some unusual mushrooms.