Amazing Spider-Man #168 (1977)

"Murder on the Wind!" Written by Len Wein, art by Ross Andru (breakdowns) and Mike Esposito (finishes), cover by Ed Hannigan and John Romita.  Under coercion from Dr. Jonah Harrow, Will-O'-the-Wisp attacks Spider-Man! If the Wisp doesn't kill the web-slinger, he will lose his life! If he does kill him, the Wisp will lose his humanity! Caught in a diabolical dilemma, what will the Wisp do with the wall-crawler's life hanging in the balance? A gut-wrenching conclusion!

Key book; first full appearance of Will-o-the-Wisp. Very good/fine condition.