Lady of Misrule

Marla awakens for her month on Earth and finds her allies missing, and an old enemy causing trouble in her home city of Felport, where Marla once ruled as chief sorcerer.

Meanwhile, a rather charming gentlemen who happens to be a monstrous exile from beyond our multiverse has decided that murdering gods might be a fun pastime, and he figures he'll start with Marla.

With the help of her former apprentice Bradley Bowman, Marla has to rescue her friends, crush her enemies, and eliminate the aforementioned existential threat–before her month runs out and she returns to the underworld.