This 1939 memento is now the most expensive comic book on Earth—and probably on Krypton, too.

A comic found in an attic has become the most valuable ever after being sold for $9.12m. The pristine copy of the first Superman comic was found by three brothers stored in their late mother’s home.

A copy of the first Superman issue, unearthed by three brothers cleaning out their late mother's attic, netted $9.12 million this month at a Texas auction house which says it is the most expensive ...

(CNN) - A vintage high-grade copy of a forgotten Superman comic book set a record at auction on Thursday. Superman No. 1 from 1939 was sold for a little over $9 million by Heritage Auctions. The ...

A Northern California family sorting through their late mother’s belongings made an unexpected discovery: an original 1939 copy of Superman No. 1. The comic went under the radar for decades before ...