What the Walking Dead Earth is
Robert Kirkman and Tony Moore launched The Walking Dead with #1 (October 2003). The zombie-apocalypse setting follows Rick Grimes and other survivors navigating collapsed civilization. The comic ran 193 issues through 2019. The AMC TV adaptation (2010-2022) ran eleven seasons across the broader Walking Dead franchise.
Collector context
The Walking Dead #1 trades in the high four to low five figures at CGC 9.8. The book is one of the most-collected modern Image Comics keys.