In this third and final Ralph S. Mouse novel from Newbery Medal–winning author Beverly Cleary, Ralph heads to school to see what humans do all day . . . and to discover what the ''S'' in Ralph S. Mouse stands for! 

With his rowdy cousins constantly wearing out his motorcycle and the Mountain View Inn manager threatening to take care of the mouse infestation once and for all, Ralph decides it's time to get away for a while. He convinces his human friend Ryan to take him along to school, where Ralph instantly becomes the center of attention.

But when Ryan's class decides to see how smart Ralph is by making him run a maze, the usually confident mouse starts to fret. What if he's not as clever as he thought?

Ralph S. Mouse is perfect for independent reading or for shared reading at home or in a classroom. This fun story is the third of a trilogy, along with The Mouse and the Motorcycle and Runaway Ralph, 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.