Free, first two in series
Steampunk, The Tinkerer's Daughter (3 Book Series)
The Tinkerer's Daughter by
Jamie Sedgwick
Tinker's War (The Tinkerer's Daughter Book 2) Jamie Sedgwick
Breeze is an outcast, a half-breed orphan born into a world torn apart by a thousand years of war. Breeze never knew her elven mother, and when her human father is recalled to the war, he leaves her in the safest place he knows: in the care of a reclusive tinker.
The Tinkerman's inventions are frightening at first -noisy, smelly, dangerous machines with no practical use- but when the war comes home, Breeze sees an opportunity. If she can pull it off, she'll change the world forever. If she fails, she'll be considered a traitor by both lands and will be hunted to her death.
(and two others)
https://www.amazon.com/s/?url=search...Jamie+Sedgwick
https://www.amazon.co.uk/s/?url=sear...Jamie+Sedgwick
https://www.amazon.ca/s/?url=search-...Jamie+Sedgwick