John Carter, Warlord of Mars ##25

Marvel Comics (Marvel All-Colour Comics)John Carter, Warlord of Mars Vol. 1

John Carter, Warlord of Mars

Writer

Chris Claremont

Interior Artist

Ernie Chan

Cover Artist

Dave Cockrum

Publication Date

July 1979

Cover Variant

UK Price Variant (12p)

Printing

First Printing

Comic Description

Story title: 'Inferno!'. This issue concludes the 'Master Assassin of Mars' storyline. It features John Carter battling threats to save Helium, one of the primary cities on Barsoom. Notable for Chris Claremont's writing during his legendary X-Men era.

Condition & Value

Condition Grade

Very Fine- (7.5)

Condition Details

Visible color-breaking spine stress marks (ticks); slight blunting on the bottom-left and top-right corners; minor edge wear along the right side; covers remain bright with good gloss; slight indentation on the barcode area.

Estimated Market Value

Raw: $3 - $8; Graded (9.0+): $25 - $45

Recent Sales

Standard issues in mid-to-high grade typically sell for under $10. UK variants hold similar value to US editions unless they are high-grade pence-price collectors' items.

Grading Recommendation

Not recommended for professional grading. The cost of CGC/CBCS services would exceed the current market value of the book. A simple bag and board for preservation is sufficient.

Notable Features

UK Price Variant (12p price instead of 35c); Marvel All-Colour Comics header; Barcoded edition; This issue is the beginning of the end for the series, which was cancelled shortly after at #28.

Authentication Notes

The paper stock and ink saturation appear consistent with 1970s Marvel Bronze Age production. The UK variant is an authentic regional distribution version printed at the same time as the US edition.

Scanned on 3/12/2026