In this cozy picture book, it's time to hibernate—but our little groundhog is NOT sleepy. So she tries to stay up all winter . . . and almost misses Groundhog Day!As snow gently blankets the land, the Groundhogs prepare for their long, snuggly hibernation. But little Tess is wide awake!Tess's parents try everything to get her to sleep, but she knows every trick in the book. When Mommy and Daddy fall asleep without her, will Tess be able to stay up all winte...

Dr. Fish works with wind power basing his designs off the shape and structure of whale flippers.

Genevieve Grotjan was a cryptanalist during World War II. She cracked the complicated diplomatic Japanese code, called Purple, saving thousands of lives.