"And Now, the Goblin!"
The infamous "No-Code" issues start here. Harry, despondent over MJ's flippant attitude towards him, dabbles in drugs with some very disturbing results...
...and an old nemesis with an axe to grind pops up again in Peter's life, this time playing for keeps.
**NOTE: Issues #96-98 are not CCA approved because of a storyline contracted by the U.S. Department of Health, Education and Welfare.
Collected in Marvel Masterworks: The Amazing Spider-Man Vol 10 HC and Spider-Man Fights Substance Abuse TPB.
Reprinted in Marvel Tales (1966) #77 and 191.