Anyone have any idea of where this is likely to drop? I'm not looking for the standard 'any Tier2 zone blah, blah, blah' answer. For instance, I was able to obtain all of the Tier1 Advanced Artisan books inside the fort in Forest Ruins. Nowhere else in Forest Ruins did I ever loot an Advanced Artisan manual outside of the fort, although rumor has it that certain mobs in Oakmyst will drop them also.
In Vermin Snye I obtained a full set of Advanced Outfitter Refining manuals, including an Advanced Outfitter Refining 11. But I have almost never had an Advanced Scholar manual drop there. So I'm wondering whether there is another zone that I'm more likely to find this book.