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Children's Literature Review REF PN1009.A1C5139 - Multivolume set, beginning in 1976 and kept up to date, containing reviews and criticism of children's literature.
Dictionary of Literary Biography REF PS243.A54 - Multivolume set covering authors who write for both adults and children. Contain excellent overviews and general criticisms of authors.
Something About the Author REF PN452.C65 - Multivolume set concentrating on authors of children's and young adult literature.