The devil's apprentice

"The Devil is retiring - but who's taking over? When teenage Pen inherits the job of caretaker for a London building with no doors and only a secret entrance from the caretaker's lodge which she must never use little does she know it will lead her into unbelievable danger. For Azmordis, also known as Satan, a spirit as old as time and as powerful as the dark, immortality is running out. In the hou...