I encountered this book about thirty years ago at school. It was probably a young adult novel rather than anything more serious and I think it was not part of any series.

The details are:

  • A boy finds himself progressively unable to interact with physical objects, slowly moving away from his physical reality into an alternate reality.
  • There was a mosaic poster of Mars made from images returned by Viking featured as well.

What is the name of this book?

marked as duplicate by Otis, Blackwood, Rand al'Thor Oct 9 '16 at 18:49

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Was it Lee Harding's 'Displaced Person' (1979)? It involves a boy who is progressively unable to interact with the world.

Goodreads link

I don't clearly remember the Viking Mars images poster being mentioned though.

  • That's it, I remember the cover now - thanks. – Adam Eberbach Jan 5 '15 at 1:00

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