In His Majesty's Service: Three Novels of Temeraire (His Majesty's Service, Throne of Jade, and Black Powder War) by Naomi Novik is available from Amazon in the US for $2.99
https://www.amazon.com/dp/B002T18VD6
https://www.kobo.com/us/en/ebook/in-...ack-powder-war
Crossover: A Cassandra Kresnov Novel by Joel Shepherd is $1.99 in the US
https://www.amazon.com/gp/product/B003ZSISN0
https://www.kobo.com/us/en/ebook/crossover-4
Luck in the Shadows: The Nightrunner Series, Book I by Lynn Flewelling is 99c
https://www.kobo.com/us/en/ebook/luck-in-the-shadows
https://www.amazon.com/gp/product/B00486U8JK