Originally Piers planned a sequel to Mute, which took place 20 years in the future and where the main character was Harlan, who was a baby in Mute.

Summary from Piers Anthony:

"Ah, yes, that sequel [ to Mute]. I can't find my original notes on it, and in any event doubt I'll ever write it. But from memory, here is what it was to be: Moot, as in something being of no further account, impractical, doubtful. Yes, like the psi powers of other folk in the presence of Harlan, who can damp any of them out. Between novels, after Mute, Knot marries Finesse, and they have daughters."

"So it is twenty-year-old Harlan who goes instead to meet Thea's normal daughter, as Knot and Thea had agreed. But it's one hell of a trip, because there are all manner of complications in this restless galaxy, and all of his formidable anti-psi ability is needed."

"Probably the dark force lopsi is trying to stop him, because his quest will somehow prejudice its case. He is accompanied by two small animals--I wonder where he got that notion?--whose psi abilities help greatly."

"Hermine Weasel and Mit Hermit Crab, unfortunately, have not lived twenty more years, having lesser lifespans, so can't participate. I had very nice animals--and can't remember them, to my frustration."

"Harlan will surely win through and find happiness with the lovely girl after changing the power balance in the galaxy."

"That's one phenomenal novel I won't be writing; now you know."