The Jensen Code

Sixteen-year-old Terry Connor is sent, along with a few of his friends, to an Outward Bound centre. On his first day at the centre Terry is taken pot-holing by the senior instructor, Alex. All goes well until, at 100 feet underground, Alex goes to search for the torch that Terry has dropped. Hours pass, and, to Terry's astonishment, when Alex finally returns he has no recollection whatever of having been absent. Terry suspects something sinister is taking place – it is surely no coincidence tha…