Praise for XO, Exoplanet:
Air & Space Smithsonian Best Children's Book of the Year
"When the planets spot something new in the galaxy, they start a letter-writing exchange that gets a little heated (for a planet) over just who gets to be called what and why. This funny fiction also teaches about planets, exo and otherwise."
“A contemporarily incisive message with a light touch.”—Publishers Weekly
“A rollicking reminder to reserve judgment before traveling in another’s orbit.”—Kirkus Reviews