"Blood Heir (Kate Daniels World)" by Ilona Andrews

"Blood Heir (Kate Daniels World)" by Ilona Andrews
    https://www.amazon.com/Blood-Heir-Kate-Daniels-World/dp/1641971657/
Book number one of a one book paranormal romance dark fantasy series. There are predecessor books, short stories, and successor books to the series also that is over twenty books long.  I read the well printed and well bound POD (print on demand) trade paperback published by Nancy Yost Literary Agency in 2021 that I bought new on Amazon recently.  Note that “Ilona Andrews” is the pseudonym for a husband and wife writing team.  I will purchase successor books if they become available (hopefully).
Julie Lennart is the adopted daughter of Kate Daniels and is blood bound to Kate Daniels.  Julie moved out to California several years with Kate Daniels aunt, Erra, to start the Shinar Confederation.  In this time, she fought a battle with the supernatural being Moloch, the child eater, and lost one of her eyes.  So, she stole one of Moloch's eyes and attached it to her face.  Now she has a new name, Aurelia Ryder, a new face, and new powers taught to her by her great aunt and her grandfather.  And she is back in Atlanta.
Kate Daniels is a mercenary in Wilmington, North Carolina and married to the former Beast Lord with an eight year old half beast half magic son. As the former owner of the city of Atlanta, Georgia, she is in hiding from her fame and just wants to live a quiet life with her family.  But, people are seeking Kate and Curren out because of the need for heroes in a horribly fallen world.
Kate Daniels's universe sucks.  Fifty years ago, the tech world crashed over the entire Earth and was replaced by the magic world in the form of a magic flare.  Guns don't work, cars don't work, electricity and phones do not work.  But magic works.  Good magic and bad magic.  After a week, the tech world came back to a drastically changed world.  And radically fewer humans.  And the magic world came back after a while.  And the tech world came back after that.  And so on and so forth.  Each world can last a few weeks or a few hours.
I liked everything about the story.  I especially liked the very clear distinction between the tech time and the magic time.  I had never thought about it that way.  The series may be inspired by "Ariel" by Steven Boyett and "Dies The Fire" by S. M. Stirling except those never interchange the tech time and the magic time, they just transitioned to the magic time.
BTW, I would recommend that you read the ten book Kate Daniels series before reading this series.
    https://www.amazon.com/Magic-Bites-Ilona-Andrews/dp/0441014895/
The authors have a website at:
    https://www.ilona-andrews.com
My rating: 5 out of 5 stars
Amazon rating: 4.8 out of 5 stars (11,922 reviews)
Lynn