Books cannot be sold

[gmlaxfanatic]

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I've tried it and it and output just says "1 Written Book" And when I try to pay for it, it just says there isn't enough output. The mods told me that with this new system I could sell books of the written and published kind. What am I doing wrong? Also interestingly when I click the chest it says Title and Author but they are both "none" or "empty". So... Yeah. Not sure here. Also I've checked the guide and it says nothing about books.