I have been using Postgres for almost a year now and I've been able to accomplish all the tasks at hand so far by googling what I need. I'm looking for a good Postgres resource so I can discover things that are possible aside from just querying and maybe to learn things beyond what I need (or I didn't know that I needed) or probably learn Postgres again from the beginning to see if I missed out small important details.
It would also be great if the book/resource discusses Postgres itself. I also prefer books over searching because books often contain distilled and well-organized content.
(I should have asked this when I was just starting with Postgres)
Side note: I'm surprised that this question hasn't been asked here yet.