65816 Manual

I wanted to post this because its a good resource and I don't think it has been posted as of yet. I'm currently reading it.

http://wiki.nesdev.com/w/images/7/76/Programmanual.pdf

Just my 2 cents, I've really liked this manual for a long time, it's a good reference even if you're already pretty fluent in 65c816, and has a lot of useful tidbits on how assembler work was done back in the day, and things like how to write relocatable code, if you're into that sort of thing.

It has the MoN seal of approval.