We read MANY books about butterflies that we checked out from our public library. Here is a list:
Are you a Butterfly by Judy Allen
Born to be a Butterfly by Karen Wallace
Monarch Butterfly by Gail Gibbons
Butterflies by Emily Neye
Butterflies by Donna Bailey
The Very Hungry Caterpillar by Eric Carle
I have also recently posted the Butterfly Life Cycle Snack.