Today's
B&N Readouts "Free Fridays" selection is
The Reluctant Swordsman by Dave Duncan, published by Open Road.
It's currently free at
Barnes & Noble.
It's still around $7 at the other stores, but
Kobo offers price-matching credit (this is probably a one-day deal, so take screenshots in case Kobo tries to verify the price after it's no longer free).
Google and
Amazon sometimes match prices by the end of the day, but haven't yet.