A Spell for Chameleon, first in the Xanth series by Piers Anthony, is $1.99 at Kindle US as part of the US Daily Deal, matched at Kobo US.
Kindle US:
https://www.amazon.com/Spell-Chamele...dp/B000FBFOFU/
Kobo US:
https://www.kobo.com/us/en/ebook/a-s...iginal-edition