Over and Under the Pond by Kate Messner with art by Christopher Silas Neal
"A secret underwater world brought to life: In this book, readers will discover the plants and animals that make up the rich, interconnected ecosystem of a mountain pond. Over the pond, the water is a mirror, reflecting the sky. But under the water is a hidden world of minnows darting, beavers diving, and tadpoles growing. These secrets and many others are waiting to be discovered over and under the pond."