Originally Posted by HarryT
I feel exactly the opposite; books that use a rich vocabulary, as Colin Dexter does, enrich my vocabulary by encouraging me to look up the meaning of words that I haven't previously encountered.
Do you really remember these words? I must admit that those books wouldn't enrich my vocabulary - I would simply forget them very quickly again and I can't imagine one single situation where I would use "dolichocephalic" instead of oval or long headed.
People are different!