Amazing Spider-Man #138 features the origin and first appearance of Mindworm (William Turner), one of Spider-Man's more unusual Bronze Age adversaries. Written by Gerry Conway with artwork by Ross Andru and Frank Giacoia, this issue continues Marvel's strong mid-1970s run and showcases a memorable Gil Kane and John Romita cover. Mindworm's tragic backstory and powerful psychic abilities have made him a recurring cult favorite among Spider-Man collectors. This CGC 7.5 example presents well and is an excellent addition for collectors assembling a complete Bronze Age Amazing Spider-Man run or pursuing first appearances of Spider-Man villains.