Book excerpt: This book offers the latest insights on language documentation, a reborn, refashioned, and reenergized subfield of linguistics motivated by the urgent task of creating a record of the world’s fast disappearing languages. Language documentation provides data to challenge and improve existing linguistic theory. In addition, because it requires input from various fields to be comprehensive, language documentation serves to build bridges between linguistics and other disciplines. Language documentation also provides resources for communities interested in language and culture preservation, language maintenance, and language revitalization. This book informs, evokes interest, and encourages involvement at all levels.