Although bridges, the Great Wall, pyramids, and skyscrapers are marvelous feats, the titles in the Engineering Wonders series show how these structures began more as problems to solve than the visions of beauty they became. Filled with accessible text and a plethora of colorful examples from around the world, the individual books address the topic at hand rather than conform to a cookie-cutter series template. Great Wall of China describes its symbolism and changing construction under numerous emperors as well as the difficulties, most notably death, during different phases of construction. Sidebars throughout relate interesting facts and ideas to consider, while a concluding time line, glossary, list of websites, and comprehension questions reinforce the content. An inspiring blend of history and STEM.