From Library Journal
Published in 1976 and 1977, respectively, these are fairly typical of Rendell's popular psychological thrillers. Demon presents a researcher studying psychopathic personalities who doesn't recognize that his seemingly shy, harmless neighbor is a total nut job. Judgement finds a police investigator trying to discern why a housekeeper slaughters her employer's entire family on Valentine's Day.
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"A classic."-The Times
"Rendell writes with such elegance and restraint, with such literary voice and an insightful mind, that she transcends the mystery genre and achieves something almost sublime."-Los Angeles Times
"It will be an amazing achievement if [Rendell] ever writes a better book."- Daily Express
"Ruth Rendell is the best mystery writer in the English-speaking world."- Time