My bookshelf is currently buy 1 get 1 for orders of 3 or more books that will be mailed together (meaning 1:1, 2:2, 3:3, 4:3, 5:4, 6:4 and so on).

Post how many you're ordering if interested in my deal (I imagine I'll see if you're doing it because of the activity spike in my requests) and go ahead and order them so that they will be taken off of the shelf and noone will have to worry about a PM saying "I'm sorry, but ___ asked for that one". I'll buddy back any applicable credits as soon as I accept the request.