A note: Boney never said we needed to use the Boon to do it. I imagine they'll want something (though perhaps our library is awesome enough that being able to get copies of our books is good enough for them), but this isn't Transcendent Boon territory, I don't think.
My priority at this point is scribes so we can start ctrl-c ctrl-v-ing other libraries, and following that I'll play it by ear.
I mean, it would feel weird for them to ask us repayment before we have cashed in our boon. Like "we owe you everything but we'll only accept repayment in one single action" More likely in my opinion they just wouldn't sweat the small stuff until they feel they'd repaid us.