DETECTIVE COMICS #366

Pre-1977 book so no direct/newsstand distinction applies. Cover shows notable wear: soft, rounded corners, a visible crease/stress line running through the upper left near the DC bullet, and general surface wear with some loss of gloss. Spine shows minor ticking and the book has been placed in a protective sleeve which shows some edge whitening along the left border. Interior and back cover were not assessed from this photo.

Detective Comics #366 arrived in August 1968, during the period when Barbara Gordon's Batgirl had become a regular presence alongside Batman and Robin in the title, following her debut the previous year. The issue is a product of DC's late Silver Age house style under editor Julius Schwartz, with Irv Novick supplying the era's characteristic dynamic Batman-family cover work. It is representative of the dependable, well-illustrated Batman team-up material of the period rather than a foundational or first-appearance issue.

Market activity reflects that status: certified sales cluster in the $60-$130 range across the bulk of the grading spectrum, with pricing rising only modestly from low to mid-high grades and no meaningful sales record above CGC 9.0 despite a modicum of higher-graded copies existing on census. Demand is driven primarily by Batman-family and Batgirl completists building out Silver Age Detective Comics runs rather than by first-appearance or origin-story collectors, which keeps the book's overall price ceiling comparatively low relative to true keys of the same era.

This is a run-filler for advanced Batman collectors and a value entry point for those assembling late-1960s Detective Comics in high grade. Raw copies in low and mid grades trade cheaply and steadily, while a top-census CGC 9.8 would likely draw a rarity premium from grade-conscious buyers given how few copies have been certified at the top of the pool, even without a corresponding sales history to confirm that ceiling.