Also, Lindsay Buroker's
The Emperor's Edge Collection, which is the first three books in her Emperor's Edge series, is free right now at Kindle US and UK, but not at Smashwords. But the first book is free on Smashwords, as well as Kindle US and UK, and Kobo US. And probably Kobo UK, but I don't look there much...
The Emperor's Edge Collection (books 1 - 3)
Kindle US:
https://www.amazon.com/dp/B007YU6EVI
Kindle UK:
https://www.amazon.co.uk/dp/B007YU6EVI
The Emperor's Edge (book 1)
Kindle US:
https://www.amazon.com/dp/B004H1TDB0
Kobo US:
https://www.kobo.com/us/en/ebook/the...n-era-of-steam
Kindle UK:
https://www.amazon.com/dp/B004H1TDB0
Smashwords:
https://www.smashwords.com/books/view/31003