That which was not

Two classic crime novel, which turned out to be narratives about the illusory nature of the world.
"That which does not become" - a story about a husband who plans the murder of his wife but does not know what price he will have to pay for it.
"She-wolf" - the story of a young man and two loving sisters in him. A young man impersonating a dead friend, and one of my sisters claims that has the gift of clairvoyance.
Both novels were the basis of films included in the Golden Fund of French and American cinema.