The Empire State Building and the Leaning Tower of Pisa are among the structures briefly but inadequately introduced in this book's overcrowded double-page spreads. A rather repetitive text, accompanied by bland color photos, explains why these tall structures are built, how they are designed for strength and flexibility, and what construction techniques are used. Glos., ind. (c) Copyright 2010. The Horn Book, Inc., a wholly owned subsidiary of Media Source, Inc. No redistribution permitted.