By Jonah Winter, Illustrated by Jeanette Winter

This is the biography of billy barr (he chooses not to capitalize his name), a man who chose to live in the Rocky Mountains alone in the early 1970’s and continues to live there to this day. The author’s note at the end explains that billy become bored and thus started measuring and noting information about the first snowfall, snowpack and when certain animals and flowers returned to the mountains or came out of hibernation. His notebooks are still used when researching climate change and global warming.

I would highly recommend this book for elementary school. It is a wonderfully written and illustrated book that can be used extensively when recognizing climate change as well as a great example of the scientific method in action.