Book excerpt: Herbie Jones and Raymond Martin haven’t been friends for long, but they already know they can count on each other in a pinch. When the class promises not to laugh when they make a mistake or do something silly, the boys are certain they can keep it. But when their teacher says that everyone can wear slippers in class, Raymond gets worried. He doesn’t have any to bring. There is an extra pair in Herbie’s house, but there is a small problem—they are his sister’s. Of course Herbie comes up with a plan to save the day. And when the buddies walk into class each wearing one girl’s slipper and one boy’s, no one laughs.