John Bierce's
Mage Errant series seems to be a Countdown deal on the UK Kindle store at the moment.
It looks like the first 3 books are FREE, and books 4-6 are £0.99, with only book 7 at full price. These are self-published, but I am willing to vouch for them. I have enjoyed them so far and the 3 free books are definitely worth a try. (I don't know if it's a complete series at 7 books, I'm only up to book 5.)
It starts off as a magic school series.
Book 1 -
Into the Labyrinth - link:
https://www.amazon.co.uk/Into-Labyri.../dp/B07J675X2C