Karl Menger, one of the founders of dimension theory, belongs to the most original mathematicians and thinkers of the twentieth century. He was a member of the Vienna Circle and the founder of its mathematical equivalent, the Viennese Mathematical Colloquium. Both during his early years in Vienna and, after his emigration, in the United States, Karl Menger made significant contributions to a wide variety of mathematical fields, and greatly influenced some of his colleagues. The Selecta Mathematica contain Menger's major mathematical papers, based on his own selection from his extensive writings. They deal with topics as diverse as topology, geometry, analysis and algebra, as well as writings on economics, sociology, logic, philosophy and mathematical results. The two volumes are a monument to the diversity and originality of Menger's ideas.

In this engaging new biography of St. Ignatius of Loyola, Peggy Sklar introduces young adults to the fascinating and significant life of St. Ignatius of Loyola, the founder of the Society of Jesus (Jesuits). Painted in vivid detail are his early days, conversion, pilgrimage and founding of his new religious order. But the author takes this unique biography to a whole new level in focusing then, in the last chapter, on Ignatius' legacy of service and spirituality, as well as examples of activities that the Jesuits are involved in and concrete applications of Ignatian spirituality. This glimpse into Ignatius' life and spirituality will not only make this saint more accessible to young people, for whom he is an ideal role model, but to adults as well.