(DONE) Add covers

[Andrés]

Hi!

Please add the cover of:

* https://www.goodreads.com/book/show/2... from https://www.amazon.es/dp/8411408612
* https://www.goodreads.com/book/show/2... from https://www.amazon.es/dp/8419412945
* https://www.goodreads.com/book/show/2... from https://www.amazon.es/dp/8419412996
* https://www.goodreads.com/book/show/2... from https://www.amazon.es/dp/8419819239
* https://www.goodreads.com/book/show/2... from https://www.amazon.es/dp/8419412228

Thank you very much!

[gem]

All added.

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