These are the books by Jan Mark that are reviewed on this site:
A family bust-up fifty years ago. What was it all about? Did uncle Tom really see aliens at the bottom of the garden?
The Eclipse of the Century
Keith dreams about a strange place, Quantoum. But when he seeks out the place and visits, his dream becomes a nightmare.
Excluded from a school trip, where best to hide out for a week than in the middle of a huge crowd of people, all busy going somewhere? But a week gives plenty of time for reflection on what's gone wrong . . .
A dystopia of political correctness, surveillance cameras and the European superstate.
Sandor Harker crashes round the Winchester family like a loose cannon on a rolling pitching deck.