In a Nutshell is a book that teaches the life cycle of an oak tree, but more importantly, readers are given beautiful life lessons on change and growth as we see the acorn through the seasons. Here, in luminous illustrations, is the life cycle of an oak-and how it supports life even after it is gone. An acorn drops from a great oak and grows. Animals nibble at it, a fire threatens it, but overcoming many challenges it eventually towers high in the forest, observing the changing human scene below. Eventually its energy passes into many other life forms.