The material includes Lindbergh's thoughts about the future of aviation, such as the Arctic route between North America and Asia and the improvement of rocket-powered aircraft.

In political affairs, the book affirms Lindbergh's opposition to American participation in World War II and his view of Nazi Germany as less bad than the Soviet Union.

The book also deals with Lindbergh's search for what he called a "return to essential life-stream values", which he associated with wilderness and with breaking the dichotomy between primitive life and civilization.

Despite his concerns, Goldberg wrote that the book is relevant as a collection of beautiful and powerful reflections from a major craftsman of "technological civilization".

He described it as "a brave book, a document of our times by a man of penetrating if rough-formed intellect, written with a singular clarity of style and feeling".