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The text explains multiple theories about the cause of phobias. It also explains what recent brain research has revealed about the neurobiological processes underlying fear and phobia.

Hydrogen power is considered by some to be a promising source of alternative energy.

As the supply of fossil fuels dwindles, alternative energy sources such as hydroelectricity may become increasingly important.

Through a narrative-driven pro/con format supported by relevant facts, quotes, anecdotes, and full-color illustrations this title examines the future of wind power.

Benjamin Franklin is among one of the most well known founding fathers, yet he was never the President of the United States.

"Greek and Roman demigods from the Prophecy of Seven must work together to seal the Doors of Death--and help Percy and Annabeth escape the Underworld in the process"--Provided by publisher.

Presents a picture book biography of Albert Einstein and how one day he thought about riding on a beam of light, which led him to his famous equation about the speed of light.

Humans are not the only ones who inhabit cities. While we might immediately think of pets, rats, or mice, Downer looks at the urban lives of raccoons, mountain lions, crows, coyotes, flying foxes, turtles, and gators.

"Greg Heffley's on a losing streak. His best friend, Rowley Jefferson, has ditched him, and finding new friends in middle school is proving to be a tough task.

Describes nine strange natural phenomena and possible explanations for them, including the day it rained frogs, an atomic explosion that occurred forty years before the atom bomb, and an eerie crystal skull.

Presents ten projects that use energy from the sun, including making a sun clock and sun prints and cooking with the sun.

Presents a chronology of the life and works of Helen Keller where she describes the challenges of being both deaf and blind and the many obstacles she had to overcome, and contains background information, historical timeline, explanatory and textual notes, and critical essays.

Designed to acquaint readers with famous stories, this book, in graphic novel format, retells Mark Twain's "The Adventures of Huckleberry Finn," a story of a boy and a runaway slave as they float down the Mississippi River on a raft.

Two inseparable ten-year-old boys discover there is room in their friendship for another person and it really doesn't matter that she is a girl.

While vacationing at Bolivia's house in Ithaca, New York, eleven-year-old Rory tries to hide his fear of flying after Bolivia suggests a trip in her uncle's airplane.