"[F]ascinating but powerful.... The underlying theme of the book reminds readers that it only takes one spark from one child to change the world." — Booklist (starred review)
"The effusive adoration between Mina and her beast, Pixit, evokes The Golden Compass....[Spark is] warm, exciting, hopeful." — Kirkus Reviews
"[Mina and Pixit's] mutually encouraging relationship will resonate....A reassuring journey of self-discovery." — School Library Journal
"Readers with a yearning for adventure and justice will delight in this one, and quiet youngsters will especially appreciate receiving respect." — Bulletin of the Center for Children’s Books
"Introverts will appreciate Mina’s strategies for finding alternative ways to stand up for herself, and her eventual carving out of her quiet but determined place among her schoolmates will resonate with them." — Horn Book Magazine
