Books on the Grassland:

Ricciuti, Edward R. Grasslands. Benchmark Books: Marshall Cavendish Corporation, New
        York: 1996.
Describes the world's vast expanses of grassland, how they developed, and the plants and animals that live there.

Waterlow, Julia. Grasslands. Raintree Steck-Vaughn, Austin, Texas: 1997.
Explains how grasslands are formed, the wildlife that inhabits them, and the impact man has on the grassland environment.

A Book on the Tundra:

Kaplan, Elizabeth. Tundra. Benchmark Books: Marshall Cavendish Corporation, New York:
        1996.
Discusses how the interplay of climatic conditions, plants, and animals defines the pattern of life on the tundra.

Books on the Ocean:

Parker, Jane. Oceans. Copper Beech Books: Brookfield, Connecticut: 1999.
Explores the nature and location of our oceans, their inhabitants, their importance to the environment, how we are destroying them, and how they can be saved.

Smart, Brian Hunter. Oceans. Copper Beech Books: Brookfield, Connecticut: 1997.
Explores the oceans of the world, discussing their floors, canyons, mountains, volcanoes, movements, storms, and plant and animal life.

Books on the Forest:

Hall, Cally. Forests. Copper Beech Books: Brookfield, Connecticut: 1998.

Kaplan, Elizabeth. Temperate Forest. Benchmark Books: Marshall Cavendish Corporation,
        New York: 1996.
Discusses how the interplay of climatic conditions, plants, and animals defines the pattern of life in a forest.

Parker, Jane. Rainforests.  Copper Beech Books: Brookfield, Connecticut: 1999.
Examines the structure and extent of the world's rainforests, describing the wealth and diversity of plants and animals found in them and efforts to stop the destruction of these precious resources.

Books on the Desert:

Ricciuti, Edward R. Desert. Benchmark Books: Marshall Cavendish Corporation, New York:
        1996.
Describes the earth's desert regions and the plants and animals that inhabit them.

Waterlow, Julia. Deserts. Thomson Learning: New York: 1996.
Describes these arid lands through which some of the world's largest rivers flow and explains how such areas are formed, how they spread, and how life survives there.