(3) 4-6 Illustrated by Dan Stuckenschneider. Categorized by historical era, a series of double-page spreads identify major inventions, ranging from the ancient world's spears and pottery to today's nuclear reactors and computers. Enhanced by glossy color illustrations, each spread briefly yet sufficiently describes how the featured invention works, the impact it has had on society, and how it has evolved over subsequent years. Bib., ind.

Reviewer: Peter D. Sieruta