This was Rendell's third novel, published in. 1966, and the tone feels more recognisably Rendellian than its predecessors. It's definitely in the genre of domestic psychological thriller, and reminded me a little of Celia Fremlin's tense, claustrophobic brand of domestic noir. (If you like this sort of thing, and haven't read Fremlin, seek her out!)
Alice, a wealthy, if dowdy, woman of thirty-eight (which she seems to consider exceedingly elderly), recently married to the considerably younger Andrew, is worrying about her friend Nesta Drage, a young widow, who recently left the area. (Alice, who has no job and no role in the family firm, hasn't much else to think about, to be fair.) The address Nesta left doesn't seem to exist, which is weird because Alice has not only been writing to her there but also receiving answers. Digging further and becoming increasingly convinced that Nesta is dead, Alice becomes ever more mistrustful of those around her - her husband, her brother, her uncle, her friends... What has happened to Nesta, and is someone really ruthlessly determined to stop Alice from finding out?
The characterisation is good - Nesta in particular, though mainly absent, is easy to visualise from others' impressions of her. It was pretty obvious what was going on with Alice, although it hardly seemed to occur to anybody.
I did dimly remember having read this before, though not the details. I knew I'd enjoyed it, though, and I enjoyed it this time too. It's probably my favourite of the three books in my Rendell reread thus far. Also, the title - Vanity Dies Hard - is good (though not the American title, which was apparently In Sickness and in Health. Wasn't that a sitcom?)
Next up, the second Wexford book, A New Lease of Death.