A system for illustrating sound and text including a book with pages having illustrations and/or text, at least some of the pages including a magnetic signature; a book holder adapted to accept the book, the book holder having a reading surface with a magnetic signature sensor, cartridge slot, a reading...http://www.google.fr/patents/US7201317?utm_source=gb-gplus-shareBrevet US7201317 - Method and system for illustrating sound and text
