A dog-shaped gunpowder mark; an.omen from the other side'; a haunted house; a chillings6ance; a case of spilt personality; a recurringnightmare; an eerie wireless message; anelderly lady's hold over a young man; adisembodied cry of 'murder'; a young man'ssudden amnesia; a levitation experience; amysterious SOS...To discover the answers, brave the supernaturalstorytelling of Agatha Christie...