M.C.A. Hogarth currently has all four books of the Her Instruments series in a bundle on sale for $1.99 (Earthrise, Rose Point, Laisrathera, and A Rose Point Holiday)
Bundle is available world wide, from most retailiers and DRM free
While these are self published they are a professional looking product and I have read the first three books of this series and now bought the bundle to get book 4 (as this is still cheaper than the individual book). I enjoyed the books and can recommend them to those who like space opera. Well worth it at this price.
"Merchant Trader Reese Eddings just wants to be left alone to run her (failing) operation in peace... so naturally she spends four books wrapped up in spies, pirates, and a space elf civil war! "
https://www.kobo.com/us/en/ebook/her...-point-holiday
https://www.amazon.com/Her-Instrumen.../dp/B077F5FTQY
The first book in this series (included in the bundle) is permafree if you want to try first
https://www.amazon.com/Earthrise-Her...dp/B00CLMGIZQ/
The author also currently has a deal on the first book of one of her other series for 99c. Note however that the tone and themes of this book are very different from the above, I still liked it but it’s not for everyone
Even the Wingless (Princes' Game Book 1)
https://www.amazon.com/Even-Wingless...dp/B005MJ0JBO/