Introduction to Christianity Introduction to Christianity Introduction to Christianity () is a 1968 book written by Joseph Ratzinger (Pope Emeritus Benedict XVI). Considered one of his most important and widely read books, it presents a "narrative Christology" that demonstrates the place for faith is in the Church. The book offers a "remarkable elucidation of the Apostle's Creed" and gives an "excellent, modern interpretation of the foundations of Christianity". Originally published in German in 1968 under the title, "Einführung in das Christentum", Ratzinger restates the Apostles' Creed and the meaning of this foundational text in language that has a greater contemporary resonance than the
What Is Mathematics? Expectations" by Charles Dickens. According to Constance Reid, Courant finalized the title after a conversation with Thomas Mann. What Is Mathematics? What Is Mathematics? is a mathematics book written by Richard Courant and Herbert Robbins, published in England by Oxford University Press. It is an introduction to mathematics, intended both for the mathematics student and for the general public. First published in 1941, it discusses number theory, geometry, topology and calculus. A second edition was published in 1996 with an additional chapter on recent progress in mathematics, written by Ian Stewart. The book was based on Courant's course material. Although