Most Popular Books by Darlene R. Stille

Our world is made up of interconnected systems. When one element changes, the entire system is affected, and nature must absorb the changes or be thrown out of balance. People often cause these environmental chain reactions through negative actions such as dumping chemical waste. But sometimes they are caused by a good ideas. It might start with a plan to get rid of disease causing insects or to fertilize soil to grow more crops. An environmental chain reaction can affect an area as small as a pond in a city park or as big as the whole planet. Nature requires a delicate balance, and it often takes just one small action to have far reaching effects.

Real-life stories of struggle, achievement, victory, and sometimes loss that are an ideal companion for history, social science, language and geography studies. The Extroardinary People series is the perfect starter for students who want to know more about the people who shaped their world, focusing on the unique histories of people from every culture, and every walk of life.

A look at what sedimentary rocks are, how they are formed and what they are used for.

This book describes the life and accomplishments of Eva Peron, whose goal in life was to improve conditions for Argentina''s poor.

Did you ever wake up one morning not feeling well? The doctor said you most likely had the flu. You stayed home from school. Many of your classmates also stayed home sick. On the television news that night, you heard that flu had been declared a pandemic. A pandemic is an outbreak of a disease that affects whole continents or even the entire world. Controlling pandemics takes the cooperation of everyone, from the government to the individual. Headline Science uses news stories and everyday applications to explain the science behind pandemics.

Discusses the biological and physical science involved when the body is engaged in physical activity.

From the tiniest butterfly to the largest elephant, all animals are made up of cells. Readers will discover the amazing realities behind these microscopic creatures with vibrant pictures and simple diagrams.

Introduces readers to the invisible world of atoms and molecules, highlighting important discoveries by physicists and chemists and describing the characteristics of specific chemical elements.

Details the life of Percy Lavon Julian and his accomplishments which made him one of the greatest chemists of the 20th century.

Describes the hazards ultraviolet rays can pose to exposed skin, and explains how to keep skin properly protected from the sun.

Examines the rise to power by Hitler and others who engineered the "final solution."

Imparts information about the life cycles of different kinds of reptiles.

Discusses vital natural resources and issues involving their use and conservation.

Ideal for today''s young investigative reader, each A True Book includes lively sidebars, a glossary and index, plus a comprehensive "To Find Out More" section listing books, organizations, and Internet sites. A staple of library collections since the 1950s, the new A True Book series is the definitive nonfiction series for elementary school readers.

Introduces the main kinds of fish--jawless and jawed, and those with cartilage or bony skeletons--and explains how they are born, where they live, their enemies, and how they eat, protect themselves, and reproduce.

Describes what waves are and how they impact human life, including ocean waves, shock waves, sound waves, light or electromagnetic waves, radio waves, and earthquake waves.

The idea of custom-made life-forms would once have been pure science fiction. Not any more, however, thanks to genetic engineering. Genetic engineering already allows single-cell bacteria to work as drug-making factories. It has made possible new types of plants that resist diseases. It could lead to cures for cancers and other fatal illnesses. Genetic engineers work with DNA, the molecule that genes are made of. They insert new genes into animals, plants, bacteria, and other organisms. Their work, however, has raised ethical concerns. Should humans tamper with the blueprint of life? Headline Science uses news stories and everyday applications to explain the science behind genetic engineering.

Explores the lives of the animals whose name means "double life," as they''ve adapted to life both on land and in water.

Explains how light waves behave by bouncing, bending, and being absorbed by objects.

Describes the physical characteristics and behavior of octopuses, as well as ways in which scientists study them.