Please note, this is for my personal reference and is in no way meant to be a comprehensive list of series.
Also, some series may be still incomplete.
Dianna Crawford

Reardon Brothers
Freedom's Promise
Freedom's Hope
Freedom's Belle

Reardon Valley
A Home in the Valley
Lady of the River
An Echo of Hope

Dee Henderson

O'Malley Family series
Danger in the Shadows (prequel)
The Negotiator
The Guardian
The Truth Seeker
The Protector
The Healer
The Rescuer

Uncommon Heroes
True Devotion
True Valor
True Honor


Kate Welsh

Love Inspired
Laurel Glen
#156 The Girl Next Door
#173 Silver Lining
#187 Mountain Laurel
#196 Her Perfect Match
#218 A Love Beyond
#252 Abiding Love
#265 Autumn Love