Four fairly random Trudi Canavan books are $1.99 each in the US right now…
The Ambassador’s Mission, Traitor Spy #1
Kindle US:
https://www.amazon.com/dp/B00351DSHI
Kobo US:
https://www.kobo.com/us/en/ebook/the...ador-s-mission
The Traitor Queen, Traitor Spy #3
Kindle US:
https://www.amazon.com/dp/B007WUW72K
Kobo US:
https://www.kobo.com/us/en/ebook/the-traitor-queen
Last of the Wilds, Age of the Five, #2 – not on sale at Kobo US but giving the link just for price check
Kindle US:
https://www.amazon.com/dp/B000N2HCTM
Kobo US (price-check):
https://www.kobo.com/us/en/ebook/last-of-the-wilds-3
Maker’s Curse, Millennium’s Rule #4
Kindle US:
https://www.amazon.com/dp/B07X9PW5FQ
Kobo US:
https://www.kobo.com/us/en/ebook/maker-s-curse-1