author
Best known for her work on Theodore Roethke, she was an American literary scholar and bibliographer whose writing helped map the life and legacy of a major modern poet.

by Margaret Allen
Margaret Allen was an American writer and scholar best known for books about the poet Theodore Roethke. The sources I could confirm connect her most clearly with Theodore Roethke: A Bibliography and Theodore Roethke: The Man and the Poet.
Her work appears to have focused on literary research rather than fiction, with an emphasis on documenting and interpreting Roethke's life and writing. That makes her especially interesting for listeners who enjoy authors who bring literary history to life through careful scholarship.
I wasn't able to confirm enough reliable biographical detail online to safely add more about her life, dates, or background.