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Provides an introduction to the science of measurements and the instruments used to measure such things as size, weight, volume, distance, and temperature; and includes fun facts and a glossary.

Thirteen-year-old Jon and his eleven-year-old sister Tania accompany their parents, who host a popular ghost hunting television series, to a spooky old hotel, where Tania's special ability to communicate with ghosts comes to light.

Jon and Tania--who can see and communicate with ghosts--journey down the Mississippi River on an antique riverboat in search of ghosts, but the spirit of a pyromaniac, riverboat captain proves dangerous to the siblings and the crew.

When a Mayan girl in ninth-century Guatemala suspects that the High Priest sacrifices anyone who stands in the way of his power, she proves herself a hero.

Examines the history, geography, and culture of Turkey, and includes maps, illustrations, facts, and anecdotes, as well as a chronology, and an index.

Examines the history, geography, and culture of Yemen, and includes maps, illustrations, facts, and anecdotes, as well as a chronology, and an index.

Jon and Tania go to a costume party at a museum full of ancient weapons and armor, and when they discover a ghost lurking among the relics, they try to help him with his mission so that he does not become a danger to everybody.

Presents an examination of the ancient Maya civilization, showing where it was located, and discussing Mayan family and community, religious beliefs and practices, kings and kingdoms, military might, economy, and culture.

Describes the tools which scientists use in observations and experiments.

Explores the science concept of magnets and magnetism, electrons, the Earth as a magnet, and how magnets are used in technology.

Discusses how dyslexia is diagnosed and treated, as well as how dyslexics can overcome challenges faced at school, at home, and on the job.

Explores the history of the green movement in the United States.

Explores the history and feats of mechanical engineering, including the role of mechanical engineering in solving current world problems, exploring space, and contributing to advances in health and medicine.

Explores Chaco Canyon in New Mexico, discussing excavations and draws upon archeological evidence to describe the cultural, political, and spiritual life of this civilization.

"Did you know that minerals were necessary for the beginning of life? Or that geothermal power could provide all the energy the world needs? Planet Earth is our home, but how much do you really know about the world beneath your feet? .