I wish there were some photos of it in the article so we could get a better understanding of what it is.

I've been to lots of bookstores with sections or displays for famously banned books. I'm pretty sure my local Indigo (basically a Canadian Barnes & Noble) has one. If that's all this is then it doesn't sound especially newsworthy outside of the celebrity involvement and maybe the renown of this particular shop.

OTOH the article describes it as a "permanent" installation, which does sound a little different from what I'm picturing.