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Monsters on the Prowl #27 cover
Cover: Jack Kirby & George Klein

Monsters on the Prowl #27

Nov 1973 · Marvel · 0.20 USD
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In "Sserpo! the Creature Who Crushed the Earth!", a discarded growth serum transforms a humble lizard into a planet-threatening giant—only for the crisis to be resolved by a daring call to alien allies from Jupiter, thanks to the ingenuity of the serum’s great-grandson. Written by Stan Lee and Larry Lieber, with dynamic art by Jack Kirby and inks by George Klein, this 1973 Marvel classic delivers a wild, imaginative sci-fi adventure with a uniquely cosmic twist. The cover, penciled by Kirby and inked by Klein, captures the towering menace with thrilling flair.

Contains 2 stories
Sserpo! the Creature Who Crushed the Earth!
13 pp · Science Fiction
SserpoThomas BurkeHenry BurkeAnne Burke

In "Sserpo! the Creature Who Crushed the Earth!", a discarded growth serum accidentally consumed by a lizard triggers a terrifying transformation—turning it into a colossal threat to humanity. When Earth's fate hangs in the balance, the great-grandson of the serum's inventor must reach out to alien allies on Jupiter, hoping their advanced technology can reverse the chaos before it's too late.

Earth Will Be Lost Tonight!
6 pp · Horror-Suspense, Science Fiction
Steve Miller"Don Russell"Nan Miller

In "Earth Will Be Lost Tonight!", a music agent discovers that his newest star, a charismatic singer named Jo, is no ordinary performer—she’s an alien whose next record could be the key to Earth’s downfall. When he realizes the truth, he tries to stop her by sabotaging her career, but the stakes are far higher than he ever imagined.

ComicBooks.com Value

Our Model is In Beta
CGC 9.8 · 4 in census $598*
CGC 9.6 · 5 in census $177*
CGC 9.4 · 7 in census $102*
CGC 9.2 · 4 in census $72*
CGC 9.0 · 4 in census $59*
CGC 8.5 · 4 in census $48*
Show all 12 grades
CGC 8.0 none in existence
CGC 7.5 none in existence
CGC 7.0 none in existence
CGC 6.5 · 1 in census $30*
CGC 6.0 · 1 in census $30*
CGC 5.5 · 1 in census $30*
* estimate — limited direct-sales data at this grade
Our model’s value — refined as new sales data arrives · CGC census counts shown where available

This exact issue on

Raw — NM+ $150 1 listing
Raw — VF $12–$18.95 2 listings
Raw — FN $18.7 1 listing Raw — VG $9.57 1 listing
Raw / ungraded $7.99–$85 3 listings
Verified matches for Monsters on the Prowl #27 · eBay asking prices, seen 12 days ago

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Full credits

writer Stan Lee
artist Jack Kirby
letterer Ray Holloway
cover pencils Jack Kirby
cover inks George Klein

Reprints

↩ Reprints Amazing Adventures #6 (1961), Strange Tales #93 (1962)

Reprinted in Amazing Fantasy Omnibus #[nn] (2007)

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