I suppose we could dispose of the books but not of the shelves. Here is the idea: the bluetooth/wifi antennas in the room are able to triangle your device. Depending of where it is, you see in your screen the books in the corresponding shelf, only that the books are not anymore there!. You walk around the library to find the book, as always. You move to the history section, your eReader shows you history book. You move to the Science section, your eReader shows Science books. You select a book, the reader shows "related" books, as amazon does.
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