Gunmetal Magic is a book mid-way through the Kate Daniels series, but featuring Kate's friend Andrea as the main protagonist. I can never really figure out which books in this series are considered books, which are officially novellas, and which are just short stories, but based on the list on their website, IA seem to consider this to be a book, and list it between the short story,
Magic Tests, and before the novella,
Magic Gifts. (And
Magic Gifts, is conveniently included as a bonus in
Gunmetal Magic...woo-hoo!)
Per eReaderIQ,
Gunmetal Magic has never been on sale below $4.99, which is a pretty steep price point for me, but the last time it was on sale at that price, I persuaded myself to buy it, rationalizing the purchase since it also included
Magic Gifts. (It's amazing what our minds can do when they need to

.)
Now it's $4.99 again at Kindle and Kobo US...
Kindle US:
https://www.amazon.com/dp/B0072NWKP6
Kindle US/Smile:
https://smile.amazon.com/dp/B0072NWKP6
Kobo US:
https://www.kobo.com/us/en/ebook/gunmetal-magic