Astrophysics facts combine with everyday second-grade school experiences in this lively chapter book in the Stink series. Shocked to hear the scientific fact that Pluto has been declared too small to be a planet, Stink stands up to both grown-up scientists and other kids when he starts a campaign to let Pluto back into the solar system. He even makes bumper stickers that read “Honk if you love Pluto.” The funny words (“double freaky-deaky”) and silly scenarios, illustrated in Reynolds’ wry, informative black-and-white drawings, make for a fast read about the triumph of the little guy and the wonders of the universe.