Ask HN: Where can I find analyses of good design?

There are hundreds of sites which publish snippets of good design. However, I'm looking for a publication focussed on illuminating what makes a design particularly effective, ideally from the mouth of the original designer.

For example, instead of just showing a screenshot of a pleasantly designed homepage, I'm looking for an explanation of the homepage. More specifically, the reasoning behind each piece of content and its styling.

Case studies from designer's portfolios are usually a good source but I've yet to find a publication which collects these analyses from many designers.