They're brother and sister, but Angus is bigger. He is a good, brave, and clever dog—and he likes that. Sadie isn't as quick to learn—or to obey. Angus thinks she's scared of everything, but Sadie knows that's not true.

Newbery Medalist Cynthia Voigt's story of border collie puppies growing up on a farm in Maine is for animal lovers of all ages, and for anyone who's ever had—or ever wondered what it would be like to have—a brother or sister just like themselves, but very, very different.