The Snow Man is “a true story about a real person named billy barr” who has spent his adult life in the Rocky Mountains. Throughout that time, he has made and kept careful measurements about weather, flora, and fauna - snowfall and snowpack, wildlife, and wildflowers - eventually compiling a treasure trove of climate data in his notebooks, which he shared with a local climate scientist. The illustrator shows barr aging as the decades pass, and shows the setting in different seasons and different types of day. Back matter includes an author’s note and further reading. ( )