If you see one of these Enhanced CDs in a bargain bin or a record fair, grab it. Not for the audio quality, but for the ghosts in the machine—the 240p videos, the clunky screensavers, and the sound of a dial-up modem connecting you to the Irons.

For the uninitiated, an "Enhanced CD" (or CD-ROM) was a hybrid format popular between 1996 and 2001. It looked like a standard audio CD, but when inserted into a computer’s CD-ROM drive, it contained a second data session filled with multimedia content. For Maiden fans, these discs were a portal. They bridged the gap between the X Factor and Virtual XI blues and the triumphant Brave New World reunion.

: Multimedia animations, family trees, and highlights from the Ed Hunter video game.

: Pre-configured internet links to official Iron Maiden websites. Key Collector Details