Victor Canning - Mask Of Memory

Enjoyable thriller about lonely wife and his husband who is working for intelligence agency and is often not at home, while at the same time hiring private dick to tail her movements. When she find another lover and her husband falls down on a cliff and dies, trouble appears and his co-workers investigate his house and his wife for some extremely important papers. Little outdated and spy element is a bit forced, but solid piece of crime fiction.