25 books · Ages 6–10 · Chapter Books, Early Readers
Horrible Harry is a 25-book series for ages 6–10 by Suzy Kline. Each book stands alone — start anywhere.
Start anywhere — each book stands alone.
That said, Horrible Harry on the Ropes and Horrible Harry Cracks the Code are great first picks.
No particular order needed — browse and pick what catches your eye.