Let's discover

A reference book dealing with the various ways man travels on land, from carts and bicycles to trucks and subways. Includes a section on roads, bridges, and tunnels.

A reference book dealing with birds and specific mammal groups such as rodents, carnivores, and Ungulates.

Describes mountains, the plants and animals that live on them, and the many pleasures they offer.

Describes the fields, gardens, crops, livestock, and processes involved in agriculture and the chores and general lifestyle of a farming family.

A topical index to the fifteen volumes of the "Let's Discover" series.

A reference book dealing with simple machines, machines in the home, transportation and power machines, and large machinery found on the farm, in construction, and in factories.

A reference book dealing with a wide variety of sports; such entertainment as movies, TV, circuses, and magic shows; making music; holidays; hobbies; and pets.

A reference book dealing with the sea, its animal and mineral treasures, tides, currents, erosion, pollution, and myths and historical events associated with the sea.

A reference book dealing with early animal life on earth from worms to dinosaurs and with man's evolution.

Depicts such seaside sites as seagulls flying, fishermen mending their nets, people swimming, and fish beneath the water.