Harry and his pals in Room 3B save the day at their teacher's wedding despite none of them being invited.

Will the best artist win? The art teacher asks the students of Room 3B to draw posters of things they love, and one of them will get to display his or her artwork on South School's brand-new TV show. Harry doesn't care about the contest. Mary, on the other hand, is convinced that her poster is the best, and she can't wait for her television debut. But if Mary's poster doesn't get selected, then she's going to make horrible trouble for Room 3B--especially Harry!

Nearly every kid in Room 3B is trying to get picked for the South School Safety Patrol Squad—especially Harry. Harry wants a star badge just like his grandpa's, so he works extra hard to be the perfect student: hanging up his jacket neatly, organizing the crayons in rainbow order, and—his favorite part—cleaning up sticky noodles off the floor after lunch. But Doug thinks someone is taking the power of Safety Patrol too far, maybe even using it to cheat at the Spring Book Fair Raffle! This is Harry’s chance to stop the horrible bully and prove that he deserves a special star. Can he do it?

When his friend Doug is infested with head lice and Mary convinces everyone to stay away, Harry and his other friend Song Lee stand by Doug and declare war on the bugs.

Horrible Harry says goodbye in the 30th anniversary finale of a beloved series! The last day of third grade is approaching fast, but a farewell to Room 3B isn't the only goodbye Doug has to say this year. Song Lee and Mary are busy preparing an end-of-year present for their favorite teacher, Mrs. Flaubert, but their excitement can't distract Doug from Harry's suspicious silence. When Harry finally admits that his family is moving to a whole other town, Doug can't believe his ears. How will he survive fourth grade without his best friend?! But Harry has a more pressing question: who's that moving in to the empty house across the street from him? And what could these new neighbors mean for their friendship?

In the 34th Horrible Harry book, Mary's plans for a perfect birthday party go horribly wrong--can her friends save the day? Mary is always neat and organized, while Harry is horribly messy. But even Mary’s carefully planned schedule can’t help when things go wrong at her own birthday party. The party is supposed to start with the kids from Room 3B taking an exciting train ride, but when their train is delayed not one . . . not two . . . but three times, Mary’s plan is completely ruined! She thinks the only thing that can make her feel better is cup after cup of sugary Island Punch—even after her mom tells her to stop. But what Mary doesn’t know is that Harry has his own wacky ideas for saving Mary’s big day. Can the kids still have fun even when nothing’s going the way it’s supposed to, or will this be the most horrible birthday ever? Praise for the Horrible Harry series: "Room 2B is every child's dream...This is one school story which rates an A+."—School Library Journal (Horrible Harry and the Green Slime) "Another perfect chapter book for transitional readers."—School Library Journal (Horrible Harry and the Drop of Doom) "Kline has an exceptional talent for capturing the language, humor, and group dynamics of a primary grade classroom... An attractive read for children just beginning to tackle novel length fiction."—School Library Journal (Song Lee in Room 2B)

Horrible Harry is at it again in his rollicking 36th story as he and his classmates participate in South School's Field Day! That means bean bag tosses, relay races, tug-of-war, and a mystery prize. Harry and Doug are determined to win, but at what cost? Original.

An insightful addition to the Horrible Harry series about appreciating and preserving the environment in your own backyard. Doug thought he knew everything about his best friend, Harry . . . until he discovers that Harry has a secret hideout in the woods just outside of South School. Unfortunately, Harry can’t keep his hideout a secret much longer, because the land is going to be sold and turned into a big apartment building—unless he and the rest of the kids in Room 3B can save it. Harry has the idea to turn the lot into a nature center, and his friends want to help after he shows them the beautiful wildflowers, yellow spotted salamanders, and slimy tadpoles. But can Harry persuade the school board to agree, too? Or will his horrible fear come true: losing his hideout forever? Praise for the Horrible Harry series: "Room 2B is every child's dream...This is one school story which rates an A+."—School Library Journal (Horrible Harry and the Green Slime) "Another perfect chapter book for transitional readers."—School Library Journal (Horrible Harry and the Drop of Doom) "Kline has an exceptional talent for capturing the language, humor, and group dynamics of a primary grade classroom... An attractive read for children just beginning to tackle novel length fiction."—School Library Journal (Song Lee in Room 2B)

When his friend Doug is infested with head lice and Mary convinces everyone to stay away, Harry and his other friend Song Lee stand by Doug and declare war on the bugs in this 35th installment.

Harry loves gym class-except for climbing rope. He's just too afraid of heights. But then a special valentine that Song Lee made for Harry goes missing. Now Harry must climb the rope in order to prove who took the valentine. But will he be able to overcome his fear? Or will Harry's Valentine's Day end horribly?