Yep, the blue books only. It's frustrating how long it takes to find enough to hit level 10. It's another example of how stam players have it better than mag. You just just kill monsters and level up fighter's guild but it takes 100 hours running around finding random books to level mages guild.
I'm bringing an old sorcerer out of retirement and he has some progress on mage guild, but the glowing gold books that would otherwise give credit for mage guild exp are not doing so. bug? Anyway to fix this?