What you might refer to as the Dalton Literary Universe has grown to the point where people are starting to ask me what order things should be read in. This post will give you my thoughts and recommendations.

The Santo Domingo Novels

Demon Hunter 1-5
Shifter Girls 1-3
Demon Hunter 6
Chronicles of Empyrea (related, not essential)
The Bikini Days series
Isekai Emperor 1-3
Red Elf Ranch 1
Dark City Girls 1
Red Elf Ranch 2
Dark City Girls 2

The World of Empyrea

Master of Thieves
Chronicles of Empyrea
Man of Stone (a story in the Dragons & Damsels anthology)
The Bikini Days series (related, not essential)
Red Elf Ranch (related, not essential)