Of Grammatology (French: De la grammatologie) is a 1967 book by the French philosopher Jacques Derrida. The book, originating the idea of deconstruction, proposes that throughout continental philosophy, especially as philosophers engaged with linguistic and semiotic ideas, writing has been erroneously considered as derivative from speech, making it a "fall" from the real "full presence" of speech and the independent act of writing. Source: Wikipedia (en)