The reasoning for cluttered e-commerce sites is simple: the more information you can cram on the page, the more the user will buy.

The literature on Weimar is immense, but we could well do with a single, authoritative, jargon-free volume that pulls all the strands together.

An enormous literature exists on the relationship between abstract painting and atonal music, and the extensive Kandinsky-Schoenberg correspondence can be found on the Internet.