Hanna-Barbera Scooby-Doo...Mystery Comics #30

In "The Treasure of Sierra Fantasma," Scooby-Doo and the gang head to a dusty Mexican town where a spectral bank robber is said to be wreaking havoc. When Scooby follows a mysterious talisman seller and uncovers a hidden bomb in the Banuelos Hotel, the team must unravel the mystery before the ghost strikes again. Written by Mark Evanier and illustrated by Dan Spiegle, this 1975 adventure brings the classic gang’s trademark wit and teamwork to a sun-baked desert town—complete with a cover by Dan Spiegle that captures the mystery’s eerie charm.