Hardcover, 512 pages
Published June 14, 1971 by HarperCollins Publishers Ltd.

Helen MacInnes: The Unconquerable (Hardcover, 1971, HarperCollins Publishers Ltd)
Hardcover, 512 pages
Published June 14, 1971 by HarperCollins Publishers Ltd.
from Wikipedia entry on Helen MacInnes:"Her 1944 book, The Unconquerables carries such an accurate portrayal of the Polish resistance that some thought she was using classified information given to her by her husband.[8][9]"
from Wikipedia entry on Helen MacInnes:"Her 1944 book, The Unconquerables carries such an accurate portrayal of the Polish resistance that some thought she was using classified information given to her by her husband.[8][9]"