This book begins by telling the reader about a host plant for butterfly eggs. The whole book consists of a conversation between a little girl and her grandfather. It tells about her discover of eggs and how she watches their transformation to caterpillars, their feasting for days on end, their secretive transformation to chrysalis, and lastly when they turn into a butterfly. The book is great because it comes from the mind of a young girl who is curious about butterflies and her process of finding answers, from her grandfather and through observation.