I don’t have a problem with you guys outlawing guns. That seems pretty sensible. I have a problem with outlawing books.
I think making books about guns illegal is definitely a slippery slope, since you could make exactly the same argument to ban books about other topics deemed illegal or socially destructive, like drugs.
From there it’s only a short step until counterculture classics like Shulgin’s PiHKAL or Uncle Fester’s Secrets of Methamphetamine Manufacture are illegal.