The Luminaries (The Luminaries, #1)

by Susan Dennard

Just like that, the inseparable trio, triad, triangle was split in two: A right angle on one side, still welcome in the world of the Luminaries. A lost hypotenuse on the other, cast adrift, floating and alone.

she’d been only nine and very obsessed with convincing everyone that Pokémon had roots in the Luminaries. She still stands by this theory.