It's the last day of second grade!

And Song Lee's having a party at the amusement park to celebrate. Harry can't wait to go on all the rides, except for one -- THE DROP OF DOOM. He's terrified. If Harry can't face his fear, he'll have to live with Sidney's teasing all through third grade. Which is worse?

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.

Harry leads a mission to place cobwebs all over school, shows the class how to make green slime, and stages a "deadly skit" that has everyone on the edge of their seats.

Third grade rocks!

Third grade brings lots of surprises, but one thing hasn't changed -- Harry and Sidney are still sworn enemies. And their relationship only gets worse when Sidney accidentally kills Harry's pet spider. But while on a class trip to a scary old prison and a creepy copper mine, Harry comes up with a horribly funny way to get revenge.

It's a busy time in Room 2B--an ant observation project is beginning, Miss Mackle is teaching square dancing, and class pictures are being taken. Then one of the fish from the 2B fish tank goes belly-up. Is Harry to blame?

When Harry finds an ad in the paper for a used telescope, Miss Mackle suggests that the class raise money to buy it. The telescope will make their moon study unit even more exciting Once they get the telescope, the class can have a nighttime moonwatch. But Harry wants to do more than watch the moon-he wants to go there Can Harry really take a trip into outer space?

"There's laughs aplenty in the short snappy text-just the thing to turn new readers on to books." (Booklist)

Horrible Harry and his classmates all love Halloween. Everyone wears a costume to school-even Miss Mackle. Every Halloween Harry shocks his classmates with his scary costume. In kindergarten he was a bloody Count Dracula, in first grade he was the Loch Ness Monster, and in second grade he was a slithering snake. So everyone in Room 3B can't wait to see what Harry is going to be this year-and they're in for a really big surprise

"Fans will welcome the characters . . . #and the# classroom, where learning is as much fun as the tricks and treats " (Booklist)

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

In addition to Christmas, the students in Harry's classroom celebrate Hanukkah, Kwanzaa, Three Kings' Day, and the Korean New Year. Illustrations.