From the author of Jurassic Park, Timeline, and Congo comes a psychological thriller about a group of scientists who investigate a spaceship discovered on the ocean floor. In the middle of the South Pacific, a thousand feet below the surface, a huge vessel is unearthed. Rushed to the scene is a team of American scientists who descend together into the depths to investigate the astonishing discovery. What they find defies their imaginations and mocks their attempts at logical explanation. It is a spaceship, but apparently it is undamaged by its fall from the sky. And, most startling, it appears to be at least three hundred years old, containing a terrifying and destructive force that must be controlled at all costs.

Caldecott Honor winner Grace Lin celebrates math for every kid, everywhere! Manny and his friends Olivia and Mei blow bubbles in this playful introduction to geometry. Manny's wand is a circle. Olivia's wand is a square. Mei's wand is a heart. What shape will their bubbles be? (Surprise! They're all spheres.) Storytelling Math celebrates children using math in their daily adventures as they play, build, and discover the world around them. Joyful stories and hands-on activities make it easy for kids and their grown-ups to explore everyday math together. Developed in collaboration with math experts at STEM education nonprofit TERC, under a grant from the Heising-Simons Foundation.

Deals with the Ricci flow, and the convergence theory for the Ricci flow. This title focuses on preserved curvature conditions, such as positive isotropic curvature. It is suitable for graduate students and researchers.

This is Jürgen Habermas's most concrete historical-sociological book and one of the key contributions to political thought in the postwar period. It will be a revelation to those who have known Habermas only through his theoretical writing to find his later interests in problems of legitimation and communication foreshadowed in this lucid study of the origins, nature, and evolution of public opinion in democratic societies.

Once Chime had been the most promising mage in the land, feted and celebrated for her potential and future role in the kingdom. Then Iris, her young competitor, made a stunning leap in skill and turned Chime's world upside down. Now no longer the most powerful, no longer promised to a prince-- and still unable to harness her magic properly-- Chime was set adrift. As was the new king's cousin-- and former heir-- Lord Muller. Yet when the neighboring kingdom threatened war, Muller and Chime were tasked with uncovering the plot. Both were flawed, yet unwilling to accept a lesser destiny than they had once known. Could this quest be the opportunity for redemption-- or would it lead them to their deaths? Award-winning author Catherine Asaro, creator of The Skolian Empire, creates her first full-length fantasy novel in a world rich with magic and power. Fans who caught a glimpse of the kingdom of Aronsdale in "Moonglow" from the Charmed Destinies collection are...

The second edition of this timely, definitive, and popular book continues to pursue the question: what is the most efficient way to pack a large number of equal spheres in n-dimensional Euclidean space? The authors also continue to examine related problems such as the kissing number problem, the covering problem, the quantizing problem, and the classification of lattices and quadratic forms. Like the first edition, the second edition describes the applications of these questions to other areas of mathematics and science such as number theory, coding theory, group theory, analog-to-digital conversion and data compression, n-dimensional crystallography, and dual theory and superstring theory in physics. Results as of 1992 have been added to the text, and the extensive bibliography - itself a contribution to the field - is supplemented with approximately 450 new entries.