Penelope is a young grizzly bear cub growing up in Yellowstone National Park with her 3 siblings Zachary, Elliott, Beanie, and her mom Nancy. She loves her family but wants time to herself as well as to find a new friend. This book explores family life, friendship, being your own best friend, and teaches young readers about grizzly bear cubs and their way of life before the age of two years. There are many pictures of grizzly bears, black bears, and grizzly bear cubs taken in Yellowstone.