The vanished - Nic Stone

Shuri, the Princess of Wakanda (and sister to the Black
Panther), sets out to save a group of kidnapped girls in this
all-new, original middle-grade novel by New York Times bestselling
author Nic Stone!

With the heart-shaped herb thriving, a group of Wakanda's finest
engineers working on expanding her dome technology, and the borders
more fortified than ever, Princess Shuri can finally focus
on what matters most: her training.

Soon, a bigger problem rears its head. The princess hears whispers
of exceptionally talented young girls across the world going
missing. A young environmental scientist in Kenya, a French physics
prodigy - the list of the missing keeps growing and growing.
And when this mystery hits home in a way the princess would've
never expected, there's no more time for hesitation: there are
lost girls out there somewhere, and Shuri is determined not to
let them be forgotten.