D. Thomas Curtin

Content: The book seems to be a firsthand account or observation of Germany during World War I, possibly by an American. This is based on details like the author sailing from New York to Rotterdam in November 1915 and the subtitle "Germany-at-War".Availability: The book is available for free as an eBook on Project Gutenberg [The Land of Deepening Shadow: Germany-at-War by D. Thomas Curtin]. You can also find it for purchase on sites like Amazon.