Henry and the Clubhouse — Beverly Cleary

Henry and his friends had gone to a lot of trouble to build themselves a clubhouse -- a place where they didn't have to put up with girls. The sign that said NO GIRLS ALLOWED -- THIS MEANS YOU especially meant Ramona. Ramona was only five years old and she usually tagged along after her older sister Beezus. Lately she'd been following Henry on his newspaper route, doing and saying the most embarrassing and annoying things in front of Henry's customers. But the day Ramona followed Henry to the clubhouse, she almost put an end to his newspaper career forever...