Each volume provides substantive critical essays and biographical information on four to eight major poets from all eras. Entries provide an introductory biographical sketch, a primary bibliography, annotated full text and excerpted criticism on the poet's works and sources for additional reading. Approximately 90-95% of critical essays are full text. Each volume includes cumulative author name and nationality indexes as well as a volume-specific title index. A cumulative title index to the entire series is published separately (included in subscription).