Hekla's children (First edition.)

Teacher Nathan Brookes leaves four pupils alone during a field trip in a national park.

Within minutes, they have disappeared. A girl called Liv returns, but she has no memory of where she's been.

When a body is found years later, it is first believed to be one of the children, but is identified as a Bronze Age man.

Yet Nathan starts to have horrific visions of the missing students.

Then Liv reappears, desperate that the man be reburied.

For he is the only thing keeping a terrible evil at bay...