Patricia Wilson 
Code of Dimensional Merchants [EPUB ebook] 

This is a race, a race of dimensional traders. And this race is destined to have only one person The race is both me and I am the whole race. Having awakened the race’s ability to cross dimensions at will.

I have embarked on a path of scavenging life force. The alien realm, the Marfa realm, the technological realm, the magic realm, wait for me to explore and scavenge them one by one. Lifeforms from all realms are the best objects for me to trade with, and your existence is to contribute your lifespan to the great race of dimensional merchants.