Old book question

[vikking]

Ok so I have a core rulebook beta from 2008, what were if any changes to the non beta?

[Azothath]

I assume you mean for Pathfinder First Edition (PF1).
There have been substantial changes.
I'd suggest you bookmark Archive of Nethys(AoN) as it has been declared an official PF1 Resource.
The PF1 FAQs can be accessed using the (?)Help button on the upper right hand side of the main Paizo webpage.
You should purchase a couple of books as pdfs or borrow them from your library. APG, Ult Equip, Ult Magic, Ult Combat are probably essential. Add Ult Campaign if you use animals/familiars a lot.

PF Unchained(UC) updated Summoner(UC Summoner) and alternates for Monk, Rogue, etc so that might be worth checking out.
Occult Adv introduced Psychic casting and some new classes, again something you might find interesting.

Some handy rules are found in the Org Play documents.
The Guide
Campaign Clarifications

[zza ni]

You can download or see the errata from this site for free to see all the printing changes. I would also take a look at the book's published FAQ.

[vikking]

Thanks for the info. A few of the books mentioned I had purchased when they first came out threw my subscription but I had to end it in 2012-13.
The nethys site has become my go to source so thank you for that