This is hard going and you have to "read like math" and not "read like a novel", but it seems to be an excellent exposition of connections between topics. Cate

This is hard going and you have to "read like math" and not "read like a novel", but it seems to be an excellent exposition of connections between topics. Category Theory in the abstract is difficult and seemingly useless, but its value lies in pulling together and formally connecting various things that might otherwise seem simply to be analogies. I haven't read the entire paper yet, but I know the authors by reputation, I've read the first 10 pages in some detail and skimmed the rest. It will be hard going, but if you can cope with it, then I think it will be of interest and value.