Wayward Soul - Wayward Gods, #1

The most powerful witch of her generation, Ellie Alwood can handle anything that's thrown her way. At least, she thinks that until she walks into her home to find Jana, her younger sister, dead on the floor with a shadowy figure stealing her soul. Consumed by grief and desperate to save Jana's afterlife, Ellie makes a deal with the devil: Jana's soul in exchange for a reaper's magical stone. Despite having the ability to pierce the veil, stealing from a reaper is almost impossible. But she has to try.  Even in death, family always comes first.
Wayward Soul is the first book in The Wayward Gods Trilogy. It's an urban fantasy story featuring witches, soul-stealing siekewa, and creative world building that will leave you hungry for more.