The illustrations are bright and colorful and fun, but the story doesn’t quite live up to them: it’s basically one long request of a young boy asking his local librarian if he can bring a woolly mammoth to the library.  He anticipates potential problems and offers solutions, and then eventually decides Woolly would be homesick, so instead he wonders if a Saber-toothed tiger could visit instead.  It sort of seems to lack a climax or point.