Books published by publisher 21st Century

A series of quotations from primary sources offers insight into the causes, battles, and outcomes of the War of 1812

Explains the purpose of the circulatory system, and looks at arteries, veins, blood, the immune system, the kidneys, blood disorders, and heart problems

Describes the physical features of the ocean biome, as well as ocean life, human use, and conservation efforts

Discusses the Soviet Union's involvement in World War II, from their non-aggression pact with Germany to their subsequent invasion and eventual defeat, highlighting the hardships endured by the Soviet people during the war years.

Explores the physical characteristics, climate, plants, and animals of the world's tundras, details the effect of human activity, and features hands-on projects and information on preservation

A behind-the-scenes look at the tobacco industry and the recent political turmoil that has surrounded it examines the changes that may be coming about in the future and what effect those changes will have.

Examines the discovery of pottery and ceramics and their uses throughout history, gives a scientific explanation of the properties of clay, and looks at how ceramics are used in modern technology.

Examines ways in which science helps solve crimes using threads of evidence such as blood, teeth, teethmarks, fingerprints, eye prints, DNA, hairs, fibers, and corpses

In this colorful book, you'll learn everything you need to start drawing standard chibis, super-chibis, and a range of two-legged and four-legged chibi animals.

Describes aquatic biomes, focusing on life in rivers and streams, and explains the effect of pollution on these biotic communities and on the lives of people everywhere

Describes the components of the human nervous system and how they function, and discusses how the nervous system affects the senses and movement

Chronicles the discovery and explorations of the planet Venus and discusses its composition and its place in the solar system.