It's all the same organization when you get down to it and Barnes & Noble's new RO Theater location is closer to Montrose than Alabama Bookstop (which is Upper Kirby).
Bookstop was a valid bookstore in this town until Barnes & Noble swallowed them up and opened the big brick & mortar stores.
There is a Border's bookstore at Alabama and Kirby. I guess B&N didn't want to compete with Border's and abandoned the neighborhood.
I liked the link you provided, lots of good pics from the good ole days.
There is (or was) a pretty good pseudo English pub around Alabama & Kirby best I can remember, not been down there in last ten years or so.
Oh, I loved Bookstop and I especially loved this Bookstop. I actually had "dates" to go there! (And I mean in more recent years - not lately, tho. Aggh, not even this century, come to think of it!)
We'd get a bite at Butera's and browse the late Cactus and then stroll the Bookstop and compare "finds."
Wish I could do something about all this, but I can't.