Many thanks for your answers, since we only have a few basic books sometimes is hard to think 'outside of my little island'. I'm starting to see Ultimate Campaign worthy of acquisition.
I happy to pique your curiosity! ;)
Ultimate Campaign is one of those books you love or hate. Nothing in it is required, so those looking for essentials and official player rules could be disapointed. However if you want ways to give you ideas for backgrounds, a background generator, rules for downtime actions and various optional rules [young characters, reputation, honor, contacts, ect] I think you'll like it.
Click on the PRD link to the left and you can take a look through the info from the book and see it's to your liking. It turned out to be one of my favorite books, and I'm one of those people that likes to see a lot of rules 'crunch' in my books.