A contest to find a better way to create clean drinking water turns into a mystery when one of the scientists goes missing. Luckily, Jack and his genius siblings are on the case in Jack and the Geniuses: At the Bottom of the World, first in the New York Times bestselling series from Bill Nye and Gregory Mone—featuring illustrations by Nick Iluzada. Jack and his foster siblings, Ava and Matt, are not your typical kids—they're geniuses. Well, Ava and Matt are. Ava speaks multiple languages and builds robots for fun, and Matt is an expert astronomer and math whiz. As for Jack, it's hard to stand out when surrounded by geniuses all the time. Things get more complicated when the trio starts working for Dr. Hank Witherspoon, one of the world's leading scientists. They travel to Antarctica with Hank for a prestigious award ceremony—but they quickly find that not all is as it seems: A scientist has gone missing. It's up to Jack, Ava, and Matt to find her . . .