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My Greatest Adventure #7 cover
Cover: Ruben Moreira

My Greatest Adventure #7

Jan 1956 · DC · 0.10 USD
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In "I Was a Prisoner on Island X," Patrolman Joe Collins finds himself at the center of an extraordinary experiment when a Venusian alien uses telepathy to merge minds with him for a single day—giving him fleeting access to alien perception and the ability to solve three long-closed cases just before his retirement. Drawn with striking clarity by Ruben Moreira, whose art defines the eerie, dreamlike tone of the story, this 1956 tale blends police procedural with cosmic mystery in a way that feels both timeless and uniquely of its era.

Contains 5 stories
I Was a Prisoner on Island X
8 pp

In "I Was a Prisoner on Island X," a naval security officer finds himself stranded on a remote island after being captured by a gang of smugglers—only to discover that survival is a game where the rules can be rewritten. The story unfolds with tense isolation and shifting power, as the officer must outwit his captors in a landscape that offers no mercy.

I Discovered a "Million Dollar Mountain"
8 pp · Adventure

In "I Discovered a 'Million Dollar Mountain'," Larry Gates fights to hold onto his precious sulphur mine claim, racing against time and unseen sabotage to meet his deadline—every twist threatening to turn his hard-earned dream into a costly loss.

Untitled Humor story
0.67 pp · Humor
Moolah the Mystic
I Was a Cop from Outer Space
8 pp · Science Fiction

In "I Was a Cop from Outer Space," Patrolman Joe Collins gets an otherworldly assist when a Venusian alien uses telepathy to merge minds with him for a single day—giving him the chance to solve three cold cases just before retiring. The story blends hard-boiled detective grit with vintage sci-fi wonder, all in a tight, taut eight-page tale.

Untitled Humor story
1 pp · Humor
Professor Eureka

ComicBooks.com Value

Our Model is In Beta
Raw (VG) $31
CGC 7.0 · 2 in census $151*
CGC 6.5 · 1 in census $127*
CGC 6.0 · 1 in census $113*
CGC 5.5 none in existence
CGC 5.0 · 1 in census $89*
CGC 4.5 none in existence
Show all 7 grades
CGC 4.0 · 1 in census $70*
* estimate — limited direct-sales data at this grade
Our model’s value — refined as new sales data arrives · CGC census counts shown where available

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Full credits

artist, inker Ruben Moreira
letterer Pat Gordon
cover pencils, inks Ruben Moreira

Reprints

Reprinted in Big Boy #9 (1957), Big Boss #4 (1971), Big Boss #54 (1982), Pulp Fiction Library: Mystery in Space #[nn] (1999)

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