Forum adverts like this one are shown to any user who is not logged in. Join us by filling out a tiny 3 field form and you will get your own, free, dakka user account which gives a good range of benefits to you: No adverts like this in the forums anymore. Times and dates in your local timezone. Full tracking of what you have read so you can skip to your first unread post, easily see what has changed since you last logged in, and easily see what is new at a glance. Email notifications for threads you want to watch closely. Being a part of the oldest wargaming community on the net. If you are already a member then feel free to login now.

I am on the infinity site and their forums but I am struggling to find the actual lore around the different armies. Does anyone know where i can read about all the different spheres and their background?

You can get a brief rundown here on their old site.

Otherwise, you're buying the books.

There is also some faction descriptions here

http://www.infinitythegame.com/sphere.php

and Data Sphere has some lore articles about the factions, still, as Kalunwen said most of the lore is in the books (and with the rules being free lore and artwork are the usual reasons to buy any of the books).

Thanks for the info gentlemen!