Speed Comics #10

"Demon Sleuths" kicks off in Speed Comics #10 (1940), a 10-cent adventure where the Flibbet sisters enlist the Three Aces for a journey to northern Paraguay to study the Guantos Indians. Written, drawn, and inked by Fred North, the story unfolds with mystery and danger as the trio uncovers a hidden hypnotic influence tied to the locals—and one of the sisters herself. The cover by Bob Powell captures the eerie tone, setting the stage for a classic pulp-inspired thriller.