To use this product, first make sure you have a copy of the Call of Cthulhu Rules. Open the two - volume hardcover set and start exploring the campaign. Begin the adventure in 1920s London as described in the book. Follow the story as the investigators travel to Paris and then to Constantinople. Use the player handouts to enhance your gaming experience. The 24' x 18' poster can be hung up to set the mood. When it comes to maintenance, keep the books in a dry and cool place to prevent damage. Avoid folding the pages or getting them wet. The poster should be stored flat or rolled carefully to avoid creases. Enjoy this horror - filled role - playing game with your friends.