Help your students read their way to better English with this new edition of the world`s best graded readers - now with a new range of World Stories, fully revised Factfiles, more audio, and new tests. The new edition includes the original Bookworms stories, plus the Starters, Playscripts and Factfiles, making it easy for you to see the full choice of books at each Stage. The highly acclaimed seven-stage system of grading, from Starter to Stage 6, remains the same, helping you to find the right level for all your students. The room was on the fourth floor, and the door was locked - with the key on the inside. The windows were closed and fastened - on the inside. The chimney was too narrow for a cat to get through. So how did the murderer escape? And whose were the two angry voices heard by the neighbours as they ran up the stairs? Nobody in Paris could find any answers to this mystery. Except Auguste Dupin, who could see further and think more clearly than other people. The answers to the mystery were all there, but only a clever man could see them.