Undercover

by Margaret Armstrong

53 pages, Paperback

First published January 1, 1976

About the author

Librarian Note: There is more than one author in the Goodreads database with this name.

Margaret Neilson Armstrong (1867–1944) was a 20th-century American designer, illustrator, and author. She is best known for her book covers in the Art Nouveau style. She also wrote and illustrated the first comprehensive guide to wildflowers of the American west, Field Book of Western Wild Flowers (1915). In later life she wrote mystery novels and biographies.

Source: Wikipedia