Speaking about Donoso's novel, here are some covers of the Spanish editions:
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There are a few gorgeous ones. In an interesting note, copies of
El obsceno pájaro de la noche were, pun intended, a
rara avis in Mexican bookstores. It was a very hard to find book a few years ago, and book collectors payed good amounts for any edition (at least in México City, where I lived back then).
I was able to get my hands on a copy for not that much money, but it had the most bland cover imaginable:
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