Iron Man #55 (Feb 1973)

Iron Man #55, published in Feb 1973, is a Bronze Age Marvel comic featuring Iron Man, written by Jim Starlin/Mike Friedrich with cover art by Jim Starlin.

Entitled Beware - Beware - Beware the Blood Brothers!, this story stars Iron Man — The Iron Avenger — as he battles powerful villains, corporate conspiracies, technological threats, and enemies from across the Marvel Universe.

It is regarded as a key Iron Man comic due to the following significant event: 1st appearance of Thanos.

Featured appearances include Iron Man (Tony Stark), Blood Brothers, Drax the Destroyer, Eros (later Starfox), and other characters from the Iron Man series.

A classic Bronze Age Iron Man comic, this issue reflects the more character-driven direction of Iron Man storytelling, with powerful adversaries, corporate intrigue, and key Marvel moments.

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