The authors have presented and interpreted Johannes Kepler's Latin text to English readers by putting it into the kind of clear but earnest language they suppose Kepler would have used if he had been writing today.

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The brilliant German mathematician Johannes Kepler (1571-1630), one of the founders of modern astronomy, revolutionized the Copernican heliocentric theory of the universe with his three laws of motion: that the planets move not in circular but elliptical orbits, that their speed is greatest when nearest the sun, and that the sun and planets form an integrated system. This volume contains two of his most important works: The Epitome of Copernican Astronomy (books 4 and 5 of which are translated here) is a textbook of Copernican science, remarkable for the prominence given to physical astronomy and for the extension to the Jovian system of the laws recently discovered to regulate the motions of the Planets. Harmonies of the World (book 5 of which is translated here) expounds an elaborate system of celestial harmonies depending on the varying velocities of the planets.

In this significant study of the music of Pierre Boulez, Dr. Koblyakov provides a complete analysis of Le Marteau sand Maître and deals with the development of serial music in the twentieth century and the problems of serial organization in general. He reaches stimulating conclusions about serial thinking and harmony in themusic of Pierre Boulez, thus enabling an understanding of the intricacies of this major composer's compositional techniques.

In 1999 the Israeli conductor Daniel Barenboim and the Palestinian writer Edward Said organised a concert in Weimar in which half the performers were Palestinians and the other half Israelis.The performance itself and the rehearsals which preceded it had a lasting effect on all the participants. How far can the relationship between music and politics be used to promote a more peaceful world? That is the central question which motivates this challenging new work by some of the leading musicians and music scholars of our time. Combining theory from experienced academics such as Johan Galtung, Cindy Cohen and Karen Abi-Ezzi with compelling stories from musicians like Yair Dalal, the book also includes an exclusive interview with folk legend Pete Seeger. In each instance, practical and theoretical perspectives have been combined in order to explore music's role in conflict transformation. The book is divided into five sections. The first, 'Frameworks', reflects in-depth on the connections between music and peace, while the second, 'Music and Politics', discusses the impact of music on society. The third section, 'Healing and Education', offers examples of the transformative power of music in prisons and settings of conflict-resolution, while the fourth, 'Stories from the Field', tells true stories about music's impact in the Middle East and elsewhere. Finally, 'Reflections' encourages the reader to consider a personal evaluation of the work with a view to further explorations of the power of music to promote peace.

"In 1611, Kepler wrote an essay wondering why snowflakes always had perfect, sixfold symmetry. It's a simple enough question, but one that no one had ever asked before and one that couldn't actually be answered for another three centuries. Still, in trying to work out an answer, Kepler raised some fascinating questions about physics, math, and biology, and now you can watch in wonder as a great scientific genius unleashes the full force of his intellect on a seemingly trivial question, complete with new illustrations and essays to put it all in perspective."—io9, from their list "10 Amazing Science Books That Reveal The Wonders Of The Universe" When snow began to fall while he was walking across the Charles Bridge in Prague late in 1610, the eminent astronomer Johannes Kepler asked himself the following question: Why do snowflakes, when they first fall, and before they are entangled into larger clumps, always come down with six corners and with six radii tufted like feathers? In his effort to answer this charming and never-before-asked question about snowflakes, Kepler delves into the nature of beehives, peapods, pomegranates, five-petaled flowers, the spiral shape of the snail's shell, and the formative power of nature itself. While he did not answer his original question—it remained a mystery for another three hundred years—he did find an occasion for deep and playful thought. "A most suitable book for any and all during the winter and holiday seasons is a reissue of a holiday present by the great mathematician and astronomer Johannes Kepler…Even the endnotes in this wonderful little book are interesting and educationally fun to read."—Jay Pasachoff, The Key Reporter —New English translation by Jacques Bromberg —Latin text on facing pages —An essay, "The Delights of a Roving Mind" by Owen Gingerich —An essay, "On The Six-Cornered Snowflake" by Guillermo Bleichmar —Snowflake illustrations by Capi Corrales Rodriganez —John Frederick Nims' poem "The Six-Cornered Snowflake" —Notes by Jacques Bromberg and Guillermo Bleichmar

This enlightening and gorgeously illustrated book explores the beauty and mystery of the divine proportion in art, architecture, nature, and beyond. From the pyramids of Giza, to quasicrystals, to the proportions of the human face, the golden ratio has an infinite capacity to generate shapes with exquisite properties. Author Gary Meisner has spent decades researching the subject, investigating and collaborating with people across the globe in dozens of professions and walks of life. In The Golden Ratio, he shares his enlightening journey. Exploring the long history of this fascinating number, as well as new insights into its power and potential applications, The Golden Ratio invites you to take a new look at this timeless topic.