(4) 4-6 Closer Look At series. Illustrated by Gerald Wood. In an odd approach to the subject, this overview takes a random from-the-top-down approach. Starting with mountains and moving to soil and the animals that burrow in it, the book then veers into a discussion of sewers, underground trains, and mines, before returning to the earth's geological layers. Each double-page spread contains several facts, along with color illustrations and photographs. Glos., ind.

Reviewer: Danielle J. Ford

(4) 4-6 Metropolis series. Illustrated by Gerald Wood. Published spring 1998.

Reviewer: Peter D. Sieruta

(4) 4-6 Voyages of Discovery series. Each double-page spread is devoted to a different aspect of exploring the North and South Poles and the continent of Africa. The flat texts discuss specific expeditions, identify famous explorers, and touch on related topics such as the African slave trade and scientific discoveries. In each book the accompanying artwork is detailed, yet easy on the eye; maps tracing the routes of various explorations are particularly helpful. Time lines are included. Glos., ind.

Reviewer: The Horn Book, Inc.