450 ft2 NYC Studio Rental Apartment
I used Billy bookcases to create an entryway and a bedroom area (the entryway is on the other side of the bookcases). I was able to use the bookcases this way by covering the back with grasscloth and anchoring the tall bookcase to the wall. You can see how I did this here: http://www.engineeryourspace.com/episodes/how-to-make-a-bookcase-wall-divider/
Shelving