For the record, you can't store an extra sack if you trade to the NPC early, so the patch notes were inaccurate. Thanks, SE, I loved figuring that out on my own. I know people often joke they don't know how their own game works, but this time they became active in it by actually telling us something that's obviously false. >_>

BTW, the two-books system is such a clusterfuck of bad design I have a hard time understanding how it ever made it past the planning stages. Basically the idea is that you want to get a book up to level 4 so you can have someone get the "increased spoils" buff for the final boss without needing to re-do level 1-3 once you get all 5 Boss KIs. You should've just let all the missions be available from the get-go (You need to clear the first 4 missions to open the boss anyway, so what difference does it make) and not have a single part of it involve an actual item that takes up inventory space. The actual missions are alright but I'm getting a headache trying to figure out the logic behind a bunch of the design choices in the lobby system. It exists solely to irritate players and make them need to shuffle between two items and waste their inventory space.