My son and I both have the older Nexus 7's. After seeing all the books on mine my son wanted me to put a book reader on his. I put Moon Reader Pro on his since it was the one I had and was familiar with. When I went to add the books he had bought, there was no Books folder like there is on mine. I added a folder and went to rename it, but it wouldn't change the name. I compared his and mine and I show quite a few folders that he doesn't. While his was plugged into my laptop I used Search and it showed a Books folder even though it is not showing on the Nexus. Does anyone know how I can get the invisible folders to show up? Any help would be appreciated!