The Lady Under the Lake by E.J. Russell

This client is all wet…
After receiving a hot tip on the whereabouts of my almost-boyfriend’s nearly-ex-husband (hey, I told you—it’s complicated!), I thought my love life was finally coming up for air. But when we stake out the remote lake, it’s not the ex who surfaces.
It’s the Faerie King’s long-missing mother (and I mean really long, as in double-digit centuries), and she wants to hire Quest Investigations. Since one of my bosses is the king’s brother, he has a tsunami of…feelings about her as a potential client, and refuses to take the case. Instead, he passes it to me.
Yes! However…
Should I be thrilled at the vote of confidence or suspicious that he’s tossing me in the deep end without a life preserver, the better to punish the woman who abandoned her kid all those years ago?
You know what? It doesn’t matter. I may be Quest’s token human, but I’ve proven I can get the job done, so I dive right in. Then the lady explains what she wants me to do: find her missing child.
Seriously? I expected more of a challenge. All I have to do is introduce her to the king and bingo, case closed. But when she says, “Not that one,” this little family drama threatens to send ripples throughout the supernatural community—especially with my boss in over his head as the prime suspect in a fae kidnapping.
As if things weren’t complicated enough… Remember that nearly-ex? When he shows up and muddies the waters, I’m faced with a choice: I can solve this case or I can finally hook my almost-boyfriend.
Dammit.