Spelmakaren Warren Spector har bidragit med en åtta sidor lång historia vid namn "Trading Places" i nummer 47-2012 av serietidningen Kalle Anka & Co. Warrens historia handlar om Kalle och Joakim som byter jobb, vilket innebär att Von Anka får jobba på en marshmallow-fabrik.
"Warren is a very clever guy and we are always looking for talented people with good new stories that can keep our weekly universe alive", säger Kalle Anka & Co:s redaktör Jonas Lindheimer.
Warren själv säger så här om det prestigefyllda uppdraget:
"I just hope my first effort did Barks and Scrooge and Donald and Disney fans proud - and that my first effort won't be my last. Writing duck stories is fun! Hope everyone enjoys reading my stories as much as I did writing them."