Sea Killers in Disguise The Story of Q Ships and Decoy Ships in the First World War

This book was first published by Leo Cooper in 1999. The book tells how, from 1915 until 1917, about 200 British ships were converted to Q ships. They were large enough to be appealing as U-Boat targets, but were not so large as to warrant the expenditure of a (scarce) German torpedo. The book also covers German raiders similarly disguised, preying on Allied merchant ships.