Night's Darkest Embrace by Jeaniene Frost

Although this isn't a Cat & Bones story nor one of its spin-offs it is a terrific read.  In a short story Ms. Frost has created a rather complex world where there are mixed bloods or partial demons, purebloods, and fallen angels.  All of these beings can traverse between some realms some more than others.  When partial Mara was 15 she and her cousin Gloria went to Nocturna realm where they were abducted as food for purebloods.  Mara was rescued but Gloria wasn't so lucky and now Mara is determined to hunt down her killer.  She is attracted to Raphael the leader of Nocturna but he is keeping secrets so she doesn't trust him.  Will he help her or hurt her in her hunt?

A short but wild ride.  I’d love to visit this world again sometime when we can spend time there.