By A Silver Thread by Rachel Aaron (reviewed by Mihir Wanchoo)

OFFICIAL BOOK
BLURB: In the world’s
most magical metropolis where spirits run noodle shops and cash-strapped
dragons stage photo-ops for tourists, people still think fairies are nothing
but stories, and that’s exactly how the fairies like it. It’s a lot easier to
feast on humanity’s dreams when no one believes you exist. But while this
arrangement works splendidly for most fair folk, Lola isn’t one of the lucky
ones.

She’s a changeling, a fairy monster made just human enough to dupe unsuspecting
parents while fairies steal their real child. The magic that sustains her was
never meant to last past the initial theft, leaving Lola without a future. But
thanks to Victor Conrath, a very powerful–and very illegal–blood mage, she
was given the means to cheat death.

For a price.

Now the only changeling ever to make it to adulthood, Lola has served the blood
mage faithfully, if reluctantly, for twenty years. Her unique ability to slip
through wards and change her shape to look like anyone has helped make Victor a
legend in the DFZ’s illegal-magic underground. It’s not a great life, but at
least the work is stable… until her master vanishes without a trace.

With only a handful left of the pills that keep her human, Lola must find
Victor before she turns back into the fairy monster she was always meant to be.
But with a whole SWAT team of federal paladins hunting her as a blood-mage
accomplice, an Urban Legend on a silent black motorcycle who won’t leave her
alone, and a mysterious fairy king with the power to make the entire city
dream, Lola’s chances of getting out of this alive are as slender as a silver
thread.