The creation of surface merchant raiders by the Imperial German Navy at the outset of the First World War, was an innovative departure from the traditional practices of naval fleet operations. These ships had originally been merchant vessels and at first sight remained so. However, they were the definitive 'wolves in sheep's clothing', for they carried beneath their disguises, which could be dropped when a target vessel was in close range, a formidable array of weaponry which included naval guns, torpedoes and mines. Some carried their own reconnaissance seaplanes and crews. This was a bold tactical initiative for these ships, acting independently, had missions that in many respects were destined to be ill fated. Their task was to do as much damage--principally to merchant ships carrying materiel for the Allied cause--as they could without (or before) being caught by the warships that were seeking to destroy them. Inevitably some were quickly sunk, or eventually beached or scuttled, and others were forced into neutral ports where they were interned for the duration of hostilities. Some, such as the SMS Wolf, were, however, phenomenally successful, and returned to their home ports to popular acclaim as romantic latter day buccaneers. This Leonaur book is based upon writings collated by the British Admiralty after the war, which was, in turn, gathered from German sources within the history of the activities of the Imperial German Navy. The book describes each vessel and details its voyages and battles, together with interesting operational and logistic information. Included in this Leonaur edition, to enhance the text for modern readers, are many pictures not included in any of the original texts. Leonaur editions are newly typeset and are not facsimiles; each title is available in softcover and hardback with dustjacket.