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Readers won't learn many "secrets" from this set, making it supplementary to most collections.
This book describes some lesser-known aspects of the Great War, with emphasis on secret plots and pacts, weapons, spies, and technology. Each topic, mainly illustrated with black-and-white photographs, is briefly covered; fact sidebars and definitions of technical terms provide supplemental information. The last chapter is an unfortunate hodgepodge of topics. Critical thinking questions using the Common Core are appended. Reading list. Glos., ind.
Teachers building science curricula may want the entire set to make comparisons and connections among volumes, although each book stands alone for collections needing to supplement only specific subject areas.