Nightlord: Fugue

Fugue is the seventh book of Garon Whited's Nightlord series.

Eric—part-time King, quasi-avatar, and unconventional wizard—has an epic quest before him. He must return to his lost kingdom to save it, slay a creature claiming to be a god, and navigate the terrible risks of a paradox that could undo everything!

And to top it off, he's trying to raise a daughter.

Nobody said being a vampire was going to be easy, but none of this was in the brochure!

https://www.amazon.com/gp/product/B08R2HKYD3