This is a volume of essays and reviews that delightfully explore mathematics in all its moods-from the light and the witty, and humorous to serious, rational, and cerebral. Topics include: logic, combinatorics, statistics, economics, artificial intelligence, computer science, and applications of mathematics broadly. You will also find history and philosophy covered, including discussion of the work of Ulam, Kant, and Heidegger among others. As these authors demonstrate, mathematicians can be at their best when writing about their first love.