Click "free sample" to read the whole book no need to purchase. The book opens in November 1915, with Hannay and his friend Sandy convalescing from wounds received at the Battle of Loos. Sir Walter Bullivant, a senior intelligence officer, summons Hannay to the Foreign Office. Bullivant briefs Hannay on the political situation in the Middle East, suggesting that the Germans and their Turkish allies are plotting to create a Muslim uprising, that will throw the Middle East, India and North Africa into turmoil. Bullivant proposes that Hannay investigate the rumours, following a clue left on a slip of paper with the words "Kasredin", "cancer" and "v.I" written by Bullivant's son, a spy recently killed in the region. Despite misgivings, Hannay accepts the challenge and picks Sandy to help him. Bullivant says that American John Blenkiron will be useful. The three meet, ponder their clues, and head to Constantinople. Starting on 17 November, they plan to meet at a hostelry exactly two months later, going each by his own route – Blenkiron travelling through Germany as an observer, Sandy travelling through Asia Minor, using his Arab contacts, while Hannay goes to neutral Lisbon under a Boer guise. There, he meets by chance an old comrade, Boer Peter Pienaar, and the two, posing as anti-British exiles itching to fight for the Germans, are recruited by a German agent. Entering Germany via the Netherlands, they meet the powerful and sinister Colonel Ulrich von Stumm, and convince him they can help persuade the Muslims to join the Germans' side. Hannay has several more adventures, meeting famed mining engineer Herr Gaudian (who later reappears in The Three Hostages), hearing of the mysterious Hilda von Einem, and meeting the Kaiser.