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 this New York Times bestselling series from Bill Nye and Gregory Mone 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 . . . and discover who's behind it all. In the Jack and the Geniuses series, readers join Jack, Ava and Matt on adventures around the world to tackle some of science's biggest challenges, including new ways to create clean drinking water, to generate clean and renewable energy, and to extend information access to the entire planet. Each book in the series includes cool facts about the real-life science found in the story and a fun DIY project.