Screened Garage Door Enclosure http://www.jo-ann-growingingrace.com/2014/12/screened-garage-door-enclosure.html
Bookshelves really are a secret passageway.
"Install a new, efficient patio door and stop drafts, save energy, eliminate leaks and restore smooth operation. We walk you through all the steps, including the critical flashing details, and you can save $300 if you do it yourself."
double Pocket Doors! must have for at least the dining room, living room, & library (makes moving furniture much easier & can also really open up a room)