Every single Ruby Dixon piece of literature in order. I have labeled all of the "extra content" as a bonus. I do recommend reading all content to get the full story though. 
This includes all books, novellas, Facebook series, etc from the following series and standalones:
Ice Planet Barbarians
Corsairs
Risdaverse
Corsair Brothers
Sunrise Cantina
Ice Home
Ice Planet Clones
Bear Bites
Aspect and Anchor
Fireblood Dragon
Royal Artifactual Guide
Bedlam Butchers MC