I know the book itself (amazing work btw FFG) has a ton of info, but I come from Exalted where not a single book out of the 24 so far has less than 100 pages of background fluff.
I understand that all you need to do is search for childish stories and make them morbid, but for me that is hard to do, also finding concept art to describe the NPCs is very hard.
I don't recommend Deviant or the internet for searching for morbid grimm things...lol...all sorts of sick people out there.