Well, this is not a book I would normally buy or read, and it reminded me of the reason why.
The story itself is entertaining, but nothing special - a teacher who goes on an excursion to Greece with his class and three of his pupils end up dead. The narration jumps between different points in time and from protagonist to protagonist (also, nothing special).
Neither the story, nor the language or the narrative skills were thrilling. 1/5 stars for a modest entertainment of 3 hours..