...a four issue mini-series featuring the Sinister Syndicate (a group of Spider-Man foes that wouldn't be considered his most dangerous), but when banded together...the group of the Beetle, the Shocker, Boomerang, Rhino, Speed Demon and Hydro-Man...could fill a mini-series!
Deadly Foes Of Spider-Man #1 and #2 (May and June, 1991)
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Deadly Foes Of Spider-Man #3 and #4 (July and August, 1991)
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