Why is the detective story? To entertain, to interest, to amuse. It has no deeper intent, no more subtle raison d' tre than to give pleasure to its readers.It has been argued that its "awful examples" (sometimes very awful ), are meant as cautionary pictures to restrain a possible bent toward the commission of crime. It is held by some that the habit of analytical and synthetical reasoning, requisite to appreciate the solving of these fictional mysteries, is of value in training the mind to logical and correct modes of thinking; the practical application of which, in the everyday affairs of life, proves a valuable asset in the worldly struggle for success.According to Mr. H. E. Dudeney, in the "The Canterbury Puzzles": "There is really a practical utility in puzzle-solving. Regular exercise is supposed to be as necessary for the brain as for the body, and in both cases it is not so much what we do as the doing of it, from which we derive benefit. Albert Smith, in one of his amusing novels, describes a woman who was convinced that she suffered from 'cobwigs on the brain.' This may be a very rare complaint, but in a more metaphorical sense, many of us are very apt to suffer from mental cobwebs, and there is nothing equal to the solving of puzzles and problems for sweeping them away. They keep the brain alert, stimulate the imagination and develop the reasoning faculties. And not only are they useful in this indirect way, but they often directly help us by teaching us some little tricks and 'wrinkles' that can be applied in the affairs of life at the most unexpected times, and in the most unexpected ways.