Glasgow Evening News says: "Whether as a romance or as a prophecy it is highly interesting."
The Western Morning News says: "Very exciting reading. Of real literary merit."
Bradford Daily Argus says: "Full of interesting and exciting reading."
Read what the Foreign and Colonial Press say.
Sydney Daily Telegraph says: "The writer's capability to speak regarding his subject is displayed on every page of the book. It is splendidly written."
The Belgian News says: "The book is a remarkable and a phenomenal success."
The Palladium (Newhaven, Conn.) says: "One of the most successful books of the season."
"Il Capitano Nemo," the well-known Italian naval writer, in L'Opinione of Rome, says that the problems put forward by Mr. Le Queux should secure the serious consideration of European Governments. "It is unquestionably a most important book," he says; "it is of interest to everyone, and the minuteness of its detail is astonishing. I can recommend it to the Italian public as a very startling yet highly instructive book."
The Italia Marinara says: "It is not a mere fantastic romance; it is a book to study seriously, and we recommend it to the Army and Navy of Italy, for it contains many valuable hints."