The Phone Goes Dead — Anthony Horowitz

Two dark and creepy tales by Anthony Horowitz, a master storyteller and the bestselling author of the Alex Rider series.
David's mobile won't stop ringing, but these are no ordinary callers. He seems to have a hotline to heaven - or is it to hell?
Isabel has a nasty feeling that the Victorian bath her parents have installed is waiting for her - and it isn't for a bubble bath, more a blood bath...