My buddy, Slug
(Book)

When Alex hurts his best friend's feelings, he learns that sometimes staying friends means apologizing. Alex and Slug are best friends. They do everything together--morning, noon, and night. But does being best friends mean you have to be together every second? Slug seems to think so! Alex tries to get some alone time--at the dentist, at the library, even playing sick--but Slug won't give him a moment to spare. Before long, Alex explodes--and Slug's feelings are bruised. Friendship isn't always easy! It's time for Alex and Slug to figure out the meaning of "sorry"--and to learn that some folks are friends forever.