Above, Natalia enciende la mecha, or Natalia Lights the Fuse, from Ediciones G.P. out of Barcelona, 1961. This was one of a series of books about Natalia, a French model who leads a double life as an international spy, with Marchal serving as the shared pen name of French authors Pierre Aspetéguy and Monique Henry. We first saw a front for this paperback over at the blog Spanish Book Covers way back, but this scan comes from a different copy, so we thought we'd share it here. Spanish Books Covers has been on hiatus a long while, but the site is still live and there are numerous interesting fronts there worth viewing. What we'd really like to know is who painted the cover art. Often with these European editions you get art reworked or copied from U.S. paperbacks, but in the case of Ediciones G.P. we think not. Put this one in the unknown file until further notice.