This was a beautifully written book about a young autistic boy who is navigating life and the country to visit his father, who is being treated for a TBI. He loves birds and birding, and he sets out to find all the birds on a list that he and his father created - the someday birds. 

On the trip, he comes across a bird journal, written as a child by his hero - a well-known scientist who studies birds to predict behavior in both birds and humans, and he sets out to return it. 

The author does a really good job of capturing autistic thoughts and behavior in a very respectful and not stereotypical way. This was a beautiful story.