Shelves In A Door?

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Just found this unique idea of putting some shelves in a door.  Really a space saver, isn't it?  But I guess, in order to keep the things stored in the shelves intact, a glass cover should be installed.  You may also want to have secret shelves so in that case, shelves should be covered with wooden panels similar to the door,  

A lot of things can actually be done if you really want to be organized!