I love it when writers make science, technology, math, and other STEM-ish things part of their fictional stories.
Big Night for Salamanders by Sarah Marwil Lamstein
Calpurnia Tate, Girl Vet (series): Who Gives a Hoot by Jacqueline Kelly
Charlotte the Scientist is Squished by Camille Andros
Forest World by Margarita Engle
Sheila Says We're Weird by Ruth Ann Smalley