FOUND!!!! She was either under the magazine rack or in the bookcase! She was cold, so I wrapped her in a warm towel for a few minutes. Added duct tape to the top of her tank to keep her in!!!
Duct tape is generally a bad idea around any snake. Get a better cage.
When my snake got loose it was strictly negligence on my part, I thought I had closed the tub but it was open just enough for it to escape. Fortunately for me, my rack is in a closet that always remains closed so even though it was a PIA to get her out from behind the safe I was lucky to have a small space to search for her.
But on a more serious note, I cannot stress more what MarkS suggested. My friend had her boa in a less than adequate enclosure and when he escaped he was found wrapped up around a room radiator. The snake had severe burns on most of his body and had to be euthanized.