Suzy Kline

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.

Room 3B just learned that Ida had an ancestor who sailed on the Titanic and lived to tell about it! Miss Mackle decides that she will take the class on a real riverboat trip. But has something gone wrong.

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.

As Valentine's Day approaches, the students in Room 2B are preoccupied with kickball and a possible wedding between Horrible Harry and Song Lee.

Marvin thinks that the new girl in class, Lucy Tinker, is a liar and a thief, but then he finds that he may have misjudged her.

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

The students in Miss Mackle's third-grade class enjoy a day of Halloween surprises, including Harry's unusual costume.

When Sidney kills Harry's pet spider, Harry wants revenge. And what better place to get it than on the class trip to a creepy old prison and copper mine.

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

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.