Just a brief announcement that I have been working with #QuantaBooks to publish a short book in popular mathematics entitled #SixMathEssentials, which will cover six of the fundamental concepts in mathematics -- numbers, algebra, geometry, probability, analysis, and dynamics -- and how they connect with our real-world intuition, the history of math and science, and to modern practice of mathematics, both in theory and in applications. The scheduled publication date is Oct 27, but it is currently available for preorder. https://us.macmillan.com/books/9780374621797/sixmathessentials/