Divinity Circuit. Senyaza Series, #5

When Marley's old flame Corbin left town on the trail of a murderer, they'd been friends. When he comes back again a year later, things are different. The hunt has changed Corbin: he's lost weight, learned new magic, and he seems to hate everything he once cherished: the nephilim corporation Senyaza, his friends and family, Marley... As the world's only Artificer, Branwyn has a waiting list a mile long.
Life is great! Until she finds out one of her creations is in the hands of a murderous angel. Recovering the device will involve tangling with faeries and wizards, and allying with an entire coterie of monsters, including the monster she hates most in the world...