Hey Madmole,
with all these amazing book series coming up, what is the reason for making books disappear after you read them?
If you could keep books after reading them you could share them with your friends, and if they read them sell the books to a trader, or build a fancy library in your base where you try to collect all existing books, so your and your friends can browse it for new books that any of you found. That would add a lot more value to books, especially making a library would be one of these small things that have no game advancing purpose but are fun to do, and I think the game needs more of this.
With books being a one-time use item we will find ourselves competing with our friends when looting a books store: Who's gonna be faster to loot the book shelves? This would be a rather annoying thing.
If you don't like the idea, would you at least consider making books not disappear a server-side option? I'm sure more people would appreciate this.
Thanks.