Photographs and text explore such inventions as the wheel, gears, levers, clocks, telephones, and rocket engines.

A twelve-year-old boy, worried that his parents may divorce, discovers that an island in the middle of the lake where he is spending the summer is the testing grounds of the mysterious Dr. Libris, who may have invented a way to make the characters in books come alive.

George and Harold and their doubles, Yesterday George and Yesterday Harold, have been taking turns going to school, but when the doubles fall prey to their gym teacher, Mr. Meaner, and his method of mind control that turns students into attentive, obedient, perfect children, it is up to original George and Harold to strike back.

Tells the story of how women throughout the ages have responded to situations confronting them in daily life by inventing such items as correction fluid, space helmets, and disposable diapers.

"A Young Readers adaptation of the New York Times Bestselling book where author, Steven Johnson, walks readers through the history and impact of six inventions that influence the modern world."--

Charlie, a math genius with otherworldly skills, is plucked out of his own time by Geneva, a bionic girl from the future, and recruited to help defeat Gramercy Foxx, a tycoon who plans to unleash a deadly biological computer virus that will enslave the world--and the two children have only twenty days to accomplish their task.

"With a plot combining science and the supernatural, four kids are caught up in a dangerous plan concocted by the eccentric inventor, Nikola Tesla"--Provided by publisher.

"It is up to Nick Slate to find the last of Nikola Tesla's powerful inventions--or face devastating consequences"--

George and Harold and their doubles, Yesterday George and Yesterday Harold, have been taking turns going to school, but when the doubles fall prey to their gym teacher, Mr. Meaner, and his method of mind control that turns students into attentive, obedient, perfect children, it is up to original George and Harold to strike back. Jorge, Berto y sus dobles, Jorge y Berto de Ayer, la están pasando muy bien. Dos de ellos van a la escuela mientras los...