In this imaginative adventure from Newbery Medal–winning author Beverly Cleary, a young mouse named Ralph is thrown into a world of excitement when a boy and his shiny toy motorcycle check in to the Mountain View Inn.

When the ever-curious Ralph spots Keith's red toy motorcycle, he vows to ride it. So when Keith leaves the bike unattended in his room one day, Ralph makes his move. But with all this freedom (and speed!) come a lot of obstacles. Whether dodging a rowdy terrier or keeping his nosy cousins away from his new wheels, Ralph has a lot going on! And with a pal like Keith always looking out for him, there's nothing this little mouse can't handle.

This fun story is the first of a trilogy, along with Runaway Ralph and Ralph S. Mouse, all inspired by the author's hope to create appealing books for boys and girls—and by the sight of her son playing with toy cars.