No by Claudia Rueda is about a little bear who isn't ready to hibernate. Like his polar bear counterpart in Polar Bear Night by Lauren Thompson, this little bear goes out to discover winter.
No is a nice little book for protective parents to read with their curious children. While the mother bear knows her little one needs to go sleep for the winter, she lets him discover it by himself. It's that message of self discovery (when its feasible and safe) that makes No such a nice little book.