"Another Fine Myth" has been
published in a Kindle version by "Prince of Cats Literary Productions". I googled the publisher (whom I had never heard of) and they do look legitimate.
According to a post on their Facebook page: "Prince of Cats LP is proud to be bringing back one of the great classics of fantasy: Robert Asprin's MythAdventures starting with Another Fine Myth in Mid July.
We love this series are are proud to have it returning with an introduction by Jody Lynn Nye and Art by Phil Foglio."
Hopefully they'll continue publish later entries in the series.