I'm reading this amazing story called Lost Boys in Oblivion. It's finished and I definitely recommend it, if you haven't already read it.
I get all my backgrounds on google. I just type in whatever background I am looking for and a bunch pop up. Or I type in something like this: red background tumblr. I don't have a tumblr and they have some good backgrounds.
I didn't even think of looking on Pinterest! I usually just save a bunch of DIY projects I'll never start lmfao