قصة الكتاب :
The Adventure of the Bruce -Partington Plans is one of the 56 Sherlock Holmes short stories written by Sir Arthur Conan Doyle . It is one of eight stories in the cycle collected as His Last Bow, and is the second and final main appearance of Mycroft Holmes . It was originally published in The Strand Magazine in the United Kingdom and in Collier\'s in the United States in 1908 . Doyle ranked The Adventure of the Bruce-Partington Plans fourteenth in a list of his nineteen favourite Sherlock Holmes stories . In the story, the brilliant consulting detective Sherlock Holmes is approached for help by his brother Mycroft, an important adviser to the British government . Ten pages of the Bruce-Partington plans, design plans for the construction of a submarine, have been stolen . Seven of those pages are discovered in the pockets of a dead man whose body is found on London Underground train tracks . The dead man is identified as Arthur Cadogan West, a government employee who worked in the building where the Bruce-Partington plans were kept but who did not have access to the safe where they were stored . Sherlock Holmes is tasked with locating the three pages that are still missing, finding out how and why Cadogan West came to be in possession of the plans, how he died and how his body came to be found on the Underground tracks .