There's so much to find out about our world, and these three books will be a treasure for curious readers 10 to adult. Using appealing graphics and an accessible writing style, the articles here discuss the anatomy of the human skeleton but also of a bicycle, the structure of the earth's atmosphere and the mechanisms of clocks. Here too are intriguing overviews of musical notation, antibiotics, farm machinery, satellites, and artificial intelligence, plus answers to such questions as: How much do clouds weigh?  There's so much to find out about our world, and these three books will be a treasure for curious readers 10 to adult. Using appealing graphics and an accessible writing style, the articles here discuss the anatomy of the human skeleton but also of a bicycle, the structure of the earth's atmosphere and the mechanisms of clocks. Here too are intriguing overviews of musical notation, antibiotics, farm machinery, satellites, and artificial intelligence, plus answers to such questions as: How much do clouds weigh?