The invention relates to a method and device for protection against theft of articles, for a resonant circuit and radio - frequency, and their applications in the ready to be automated of books. & br / the automatic ready for books comprises three boxes (100, 200, 300), the first (100) harbours the drive means and means for applying labels, forming a screen to the resonant circuits are inserted in the coverage of books, the second (200), surperposé to the first, contains the interface between the controller to a central computer, and the third (300) harbours the laying means of the labels and supports a shelf (310) equipped with a rule (311) of the positioning of a book and an opening (312) of the passage of the labels. The front face of the box (200) includes a reader (201) of a magnetic card, a control screen (202) and a validation button (203). br / main application: protection system.
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