African American National Biography-Published in 2008, this 8 volume sets covers both historical and contemporary African Americans. E185.96 .A4466 2008.
Dictionary of Literary Biography is a valuable place to start when doing research on an author. It provides personal background, a bibliography, brief critique of the body of their work and contributions to the fields, as well as locations of major collections. PN 451 .D53.
Contemporary Authors also provides an overview of an author, as well as additional biographical and critical resources to consult. PN 451 .C6.
Biography and Genealogy Master Index is an index of indices, providing coverage of Biography Index, Who’s Who, Contemporary Authors and other biographical sources. CT120 .B56.
There are a number of other author-specific resources, most of which are accessible via LibCat. For example, Hispanic Literature Criticism, Black Literature Criticism, Twentieth Century British Literature: A Reference Guide and Bibliography, and Masterplots II: British and Commonwealth Fiction Series.