MYSTERY IN SPACE #100

Cover shows moderate wear consistent with a mid-grade Silver Age book: visible spine stress lines and slight whitening along the spine, minor corner blunting at top and bottom right, and light surface wear/scuffing across the green background. There is a faint crease near the lower left edge and some minor edge wear along the right border. Colors remain bright with no major fading or staining visible; the book is in a protective sleeve. Interior and back cover were not assessed.

Mystery in Space #100 arrived in mid-1965 as a milestone numbering achievement for one of DC's longest-running science-fiction anthology titles, built around the adventures of Adam Strange, the archaeologist-turned-interplanetary hero who commuted between Earth and the planet Rann via the Zeta-Beam. By this point in the run the strip had matured into a signature entry in DC's Space Age line, pairing Gardner Fox's tightly plotted scripts with the polished visual style associated with the character's core creative team. The issue carries the historical weight of a centennial number in a title that helped define DC's science-fiction output through the late 1950s and 1960s, though it does not contain a first appearance, origin, or other landmark event that price guides single out as a key moment.

Market data reflects a modest, thinly traded book. Certified population remains small, with only about twenty CGC Universal copies recorded and sales concentrated in the mid-to-high grade tiers rather than at the top of the census. Pricing climbs gradually through grade 7.5 and 8.5 before showing a meaningful jump at 9.2, the highest grade with recorded sales, indicating that demand is real but narrow, driven mainly by Adam Strange completists and Silver Age anthology collectors rather than broad speculative interest.

This is a book that trades steadily but quietly: raw low-grade copies serve as inexpensive run-fillers for Mystery in Space or Adam Strange collectors, mid-grade raw copies appeal to readers assembling a presentable run of the series, and a high-grade slab would draw interest primarily from specialists chasing top-census copies of Adam Strange's Silver Age adventures. Absent a recognized key attribute, values will continue to track overall Silver Age DC demand and the durability of Adam Strange's collector base rather than any single dramatic price spike.