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Gr 4–8—In Early Explorers, the author begins by describing the challenges faced by the first European explorers: rudimentary navigational aids, nil or nearly nil foreknowledge of non-European regions, and the general danger of travel by sea...
Gr 6–10—At its greatest extent in the 13th and 14th centuries, the Mongol Empire stretched from northeastern Europe to northern China and the Pacific, and this well-written set covers its entire history, from founding to expansion and enormous influence to decline...
Gr 3–5—Each title in this series is made up of about 10 chapters with dramatic headings, such as "The Egyptians Loved Partying" or "Some Vikings Went Berserk...