[javadi82]

If it is OK, could you please describe at a high-level on the de-duplication involved in mapping the following 3 links to a single book - a) https://news.ycombinator.com/item?id=836633 b) https://news.ycombinator.com/item?id=1527084 c) https://news.ycombinator.com/item?id=1718951 because the amazon links contained in the HN comment links are all very different but still point to the same book - "Javascript: The Good Parts".

[raimonds]

I extract ASIN (Amazon ID) from URL and then use Amazon API to get so called "parent ASIN" (to acount for different editions like paperback, ebook etc).

[philfreo]

The same ID appears in all the different forms of the Amazon links: 0596517742