Shadow Stealing: An Urban Fantasy Adventure. Shadow Blade Series, #5

Sometimes, things do not turn out the way we thought they would.First, my father drops a bombshell on me, leading me to a choice that means either trusting him, or coming out as his enemy. The repercussions of making the wrong choice will change my world, so I'd better figure out if he's telling the truth. Meanwhile, Wendy Ryles, a selkie, asks us to find her missing husband. Our investigation leads us to what we initially think is a cult.
But, as we investigate, we discover an ancient race of reptilians. They're abducting humans. We have to find out why they're here, and what they're doing with the people they've kidnapped, before they manage to vanish out of our reach.