"A biographical novel in verse of three different girls in three different time periods who grew up to become groundbreaking scientists"--

A glitchy time machine strands a bumbling janitor and a brilliant scientist in the distant past, and they must find their way home before they're attacked by angry cavemen or eaten alive by a saber-toothed tiger.

"Do you dare to join a fearless trio of trick-or-treaters who visit the mysterious home of an eccentric scientist? Along with owls, pumpkins, and helpful robots, they discover that a little bravery and some LEGO creativity can make a frightfully fun night"--

Sam, Lucy, and Antonio have a new substitute teacher, who happens to be the great-great-grandson of Orson Eerie, the evil scientist whose spirit possesses and infects their elementary school--and the friends are afraid he may be trying to bring Orson back to life.

Rafi Bywater is unlike anyone else. The people in his village don't trust him because he spends too much time in an abandoned dragon lair. When a stranger, Mister Flitch, accuses Rafi of being "dragon-touched," Rafi sets off to discover the truth about dragons -- and about himself. On his journey, Rafi befriends a brilliant scientist, Maud, who has secrets of her own. Together they search for dragons while escaping from a dangerous dragon hunter,...

On a remote Scottish island, 14-year-old Max's life is changed forever when he loses his hearing in a boating accident. He has to navigate a new silent world alone--even his parents don't understand that wearing a hearing aid doesn't mean he hears clearly. On top of that, he's placed in a special educational needs class surrounded by kids he once picked on. When people start acting strangely and Max's hearing aid picks up odd sounds from a new wind...

"Frances Stenzel was just trying to prove her scientific worth to her parents...instead, she reawakened her great-grandfather's secret and most terrible invention. Before it can destroy the town, she sets off after it...and she'll have to face...angry locals and an unexpected friendship...while the trail for the monster goes cold and time is running out before her science career, and the city itself, are doomed forever"--

When, in the process of testing his newest time machine, Professor von Volt accidently brings a triceratops, Helen of Troy, Attila the Hun, Charlemagne, and Christopher Columbus to present day New Mouse City, it is up to Geronimo and his friends to return them all to their own times and places--without being eaten by a T-Rex or skewered by Trojan warriors.