Comic Book Addiction is an online retailer specializing in vintage, rare, and collectible comic books, serving collectors across North America. Its selection spans comics from the 1940s to today, with both raw and professionally graded editions, including key issues and high-grade, investment-oriented collectibles. Shoppers can browse by era, publisher, character, genre, variants, signatures, and condition, with categories covering Golden, Silver, Bronze, and Modern Age comics. The catalogue features titles from Marvel, DC, Image, and other publishers, alongside Canadian Price Variants and newsstand editions.

The store highlights new arrivals, special deals, curated monthly picks, and premium collectibles, with offerings ranging from accessible books to sought-after grails. Collector services and benefits include gift cards, payment plans, a refer-a-friend program with store credit, and an option to sell comics. Comic Book Addiction also promotes partnerships with GoCollect and GP Analysis, resources for comic market data and trends. The site describes the business as trusted by collectors since 1998 and provides customer support by phone and email.