by Isaac Asimov · tapa blanda · ISBN 9780586058428
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«'X' Stands for Unknown» is a collection of scientific essays by Isaac Asimov, published by HarperCollins in paperback (272 pages, in English).
The book brings together a series of short essays in which Asimov explains concepts of physics, chemistry, astronomy and mathematics. The texts range from electromagnetism and cosmic phenomena to computer circuits, with a popular science approach.
Published in 1986, it is a non-fiction title classified in the Science category.
For readers of all ages with curiosity about science.
Isaac Asimov was an American writer and professor of biochemistry at Boston University. During his lifetime, Asimov was considered one of the "Big Three" science fiction writers, along with Robert A. Heinlein and Arthur C. Clarke. He wrote or edited more than 500 books and an estimated 90,000 letters and postcards. Best known for his hard science fiction, Asimov also wrote mysteries and fantasy, as well as popular science and other non-fiction. His work spans nine out of the ten categories of the Dewey decimal system.
