In the UK, we only sell AA literature at AA meetings. Bookshops and online stores are aplenty, enabling people to buy other material. AA sticks to its purpose.
One of the reasons we do this is so that prospective or new AA members experience actual AA rather than AA with sundry other admixtures. Sometimes groups have introduced other materials, sometimes quite questionable, shocking materials, with prejudiced, bigoted content. This is why we keep it very simple in the UK: if you want to read other materials or recommend other materials, do that in your own time and not in the name of AA.