This is a charming, touching story about an imaginative boy whose best friend is an oak tree named Bertolt. The boy admits to being an outlier among his peers, but insists that while he is alone, he is never lonely. Being independent suits him, and he considers his difference to be his advantage.

A daily refuge is his tree, Bertolt, who provides him a literal and metaphorical vantage point from which to observe the world. Bertolt gives by simply being--he is host to the boy's imaginative adventuring. In springtime, when Bertolt's leaves are abundant and communities of animals make...