Advance of the Union question

Actually, this raises another question. Did they pull another stunt like the one with Dual Blades after Chaos, or do Wild Hunters not have to pass they're mastery books again?

I think these days are gone, where u have to pass the books over again. At least if this will be the case, Im sure that every wild hunter will get free Adv final attack books.

But I got another question... Which books can mechanic, battlemage and wild hunter choose between the event?