Should you really never judge a book by its cover? Had I gone along with that dictum years ago I would not have happened upon Edmund Crispin. Shameful though it is to admit it, I was attracted not by the name of the author – unknown to me – but by a Penguin Crime jacket. Its green and cream design caught my eye at an Amnesty International book sale in the church opposite our house. Our dining-room had recently been redecorated, and I judged Frequent Hearses would, suitably displayed, tone with the colour scheme.