I've just re-read this 14 years after first buying it. The book tackles the serious subject of family abductions in a meaningful way, without letting it get too heavy. At the start of the book Marianne is not a sympathetic character, and though she becomes more so as it goes on, her selfishness still seems to motivate her more than an objective concern for her children. This makes her a very lifelike character, but takes away some of the anguish that the plot might otherwise make you feel.
However it was still a good read. As always Deborah Moggach writes fluently with an eye for day-to-day detail that makes her books feel close to reality.