Twayne's Authors Online This database contains over 10,020 documents; documents may be searched with fourteen different options (and in combinations), for example, by title, keyword, and author. Searches can be narrowed by year, subject area, target audience and publication language. Twaynes authors online is comprised of Twayne's U.S. Authors, Twayne's English Authors, and Twayne's World Authors. Each of these individual titles provides literary criticism for approximately 200 authors, bringing the total number of authors covered in the Series to nearly 600.;"Access provided by the Tennessee State Library & Archives and Tenn-Share, part of the Tennessee Electronic Library"