#660 "Other Sites" Amazon links fail with some ISBNs

[Uzume]

We are currently linking to Amazon detail pages (which have ASINs in the URL) via the magic where ASINs match the ISBN-10s for most book publications, however, this is not always true. We already hack around this for ebooks and 979 prefixes (see [bugs:#257] and [bugs:#573]) but there are other cases as well.

An example is http://www.isfdb.org/cgi-bin/pl.cgi?613367 which was published in 2005 with the ISBN-10 1-930847-69-6 but in Amazon it is at ASIN B000VTFAXM. This works https://www.amazon.com/dp/B000VTFAXM and this does not: http://www.amazon.com/dp/1930847696.

We should move to Amazon ISBN linking via ISBN-13s in their search links:

• http://www.amazon.com.au/s?search-alias=stripbooks&field-isbn=%s Amazon AU
• http://www.amazon.com.br/s?search-alias=stripbooks&field-isbn=%s Amazon BR
• http://www.amazon.ca/s?search-alias=stripbooks&field-isbn=%s Amazon CA
• http://www.amazon.cn/s?search-alias=stripbooks&field-isbn=%s Amazon CN
• http://www.amazon.de/s?search-alias=stripbooks&field-isbn=%s Amazon DE
• http://www.amazon.es/s?search-alias=stripbooks&field-isbn=%s Amazon ES
• http://www.amazon.fr/s?search-alias=stripbooks&field-isbn=%s Amazon FR
• http://www.amazon.in/s?search-alias=stripbooks&field-isbn=%s Amazon IN
• http://www.amazon.it/s?search-alias=stripbooks&field-isbn=%s Amazon IT
• http://www.amazon.co.jp/s?search-alias=stripbooks&field-isbn=%s Amazon JP
• http://www.amazon.com.mx/s?search-alias=stripbooks&field-isbn=%s Amazon MX
• http://www.amazon.nl/s?search-alias=stripbooks&field-isbn=%s Amazon NL
• http://www.amazon.co.uk/s?search-alias=stripbooks&field-isbn=%s&tag=isfdb-21 Amazon UK
• http://www.amazon.com/s?search-alias=stripbooks&field-isbn=%s&tag=isfdbinternes-20 Amazon US

Notice we can still use our Amazon US and UK affiliate tags which we are not currently using for ebook and 979 prefix linking.