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Gr 3—4—Though narrowly focused, these introductions offer a crowd-pleasing combination of relatively substantial information—including specialized terms (ectotherm, neurotoxin) that are consistently defined nearby—with sometimes-thrilling photographs of snakes chowing down on hapless prey or themselves becoming prey to larger predators...
Gr 4—8—From gross-out goodies—mummification, sewers, early water closets—to everyday, familiar items, such as screws and books, these titles show how ideas and inventions changed the way things were done...
Gr 9 Up—A common sentence opens the introductions to the titles in this series, stating that, "The history of civilization is essentially the story of human beings understanding and manipulating matter...
Gr 1—3—Riveting, close-up photos of mantises looking inscrutably at readers and brightly lit centipedes and spiders either in natural settings or cut out and placed on blank backgrounds will draw young audiences to these introductions...
Gr 1—2—Anchored by small but legible maps showing each continent's geographical extent, national borders, landforms, and population density, these primer-level surveys systematically deliver broad but simplistic topical overviews...