More to explore:
I just saw one of the designers do this on HGTV. I love it!
hidden room/closet; This is so cool! Better than the bifold doors we have and more storage!
Hidden Laundry Room
closet tunnel between children's rooms
Love the bookshelf frame idea
Very cool Door idea
Bookshelf closet door -- LOVE. by elizabeth.marschall
Hidden TV. THIS. IS. FREAKING. GENIUS.
Reading nook want want want