It has happened with J. R. R. Tolkien's Novel The Hobbit.
It has happened with David Brin's short story Thor Meets Captain America.
Supposedly it is going to happen with Robert Jordan's novella (expanded into a novel), A New Spring.
They have all been adapted into comic books/graphic novels.

I was wondering which of Donaldson's short storiers and novellas would translate well into comics...
The one I would most like to see would be Gildenfire...it would be so cool to see the Haruchai in action...Lords Hyrim and Shetra with the wolves...some good action to be found there...
