A first edition of a 'Superman' comic from 1939 — which originally cost 10 cents — has become the most expensive comic ever ...

But next week, Joshua Williamson and Sean Izaakse, are bringing the main attraction with DC's KO: Superman Vs Captain Atom.

The brothers discovered the comic book in a cardboard box beneath layers of brittle newspapers, dust and cobwebs in their deceased mother's San Francisco home last year, alongside a handful of other ...