Darlings, welcome back!
I currently have five (5!) books available via the major ebook retailers. While none require a specific reading order, things in Duty, Honor, Family will make more sense if you have previously read Broken Soldier. My suggested reading order is thus:
Duty, Honor, Family
Falling Too Hard
There are two additional novels that are not as thematically similar, though just as delightful:
The Viking’s Surrender