The Adventures of Jerry Muskrat, by Thornton W. Burgess

Jerry Muskrat and his friends love their homes in the Smiling Pool and Laughing Brook. So when the Smiling Pool suddenly stops smiling, and the Laughing Brook stops laughing, Jerry Muskrat goes on an adventurous investigation along with Grandfather Frog, Billy Mink, Little Joe Otter and Spotty the Turtle.