Selling and buying premium used books since 1989 from a University Avenue address that previously housed Comic Kingdom — the store co-founded by Comic-Con co-founder Richard Alf in 1975 — Footnote Books carries one of Hillcrest's longest continuous bookselling legacies across specializations in Military History, Science Fiction, Graphic Novels, Poetry, and Paper Ephemera. The Military History section stocks hundreds of Osprey titles covering armor, aviation, and infantry campaigns across major conflicts — a cataloging depth that draws researchers and collectors along the same University Avenue corridor as the historical and outdoor reference materials stocked at San Diego Scout Shop for Scouts and troop leaders. Graphic novel collections, Science Fiction, Paper Ephemera, and Cooking titles rotate through in-store inventory — thousands of titles held on-site that never appear in the shop's AbeBooks online listing and are accessible only by visiting the store. The shop buys in-store and ships worldwide through its AbeBooks storefront, active since 1999, operating on the same Hillcrest used-goods corridor as HUMANITY!, where curated vintage finds draw University Avenue shoppers who prefer specialty browsing over mass-retail discovery. At the former Comic Kingdom address where San Diego's specialty retail comics history began in 1975, rare editions, paper ephemera, and specialty history volumes sit in-store only — accessible exclusively to collectors willing to browse in person beyond what the AbeBooks platform can surface.