I think of Autumn filled with Throwback books because I love Autumn best and I love all the great books associated with Fall. The Busy Little Squirrel by Nancy Tafuri is a classic for me, even though it was only published in 2007.
I love Tafuri's books because they are the perfect size for Storytime, nice and big, but not too big. The illustrations for this book are rendered in brush pen, watercolor pencils, and ink.
Squirrel was getting ready for winter, but his friends wanted him to spend time with them. Squirrel was too busy. I love having the children help say that refrain, "He was sooooooo busy!"
Using this with toddlers to Kindergarteners works best for me.