哈尔·克莱蒙特，本名哈里·斯塔布斯，生于美国麻省，曾获哈佛天文学学士学位，二战时入伍，成为一名轰炸机飞行员。退伍后成为中学教师，长期教授科学课程。 克莱蒙特一生共创作了十五部长篇以及大量中短篇小说。1954年，《重力使命》开始在《惊奇科幻》连载，成为他的代表作，该书也是科幻史上硬科幻小说的代表。 克莱蒙特在科幻作家和读者中具有崇高的声望。他是1991年世界科幻大会的主宾，1998年入选科幻/奇幻名人殿，美国科幻奇幻作家协会于1999年星云奖颁奖仪式上授予他科幻大师称号。

For a profit -- and adventure -- Barlennan would sail thousands of miles across uncharted waters, into regions where gravity itself played strange tricks. He would dare the perils of strange tribes and stranger creatures -- even dicker with those strange aliens from beyond the skies, though the concept of another world was unknown to the inhabitants of the disk-shaped planet of...(展开全部)

For a profit -- and adventure -- Barlennan would sail thousands of miles across uncharted waters, into regions where gravity itself played strange tricks. He would dare the perils of strange tribes and stranger creatures -- even dicker with those strange aliens from beyond the skies, though the concept of another world was unknown to the inhabitants of the disk-shaped planet of...(展开全部)

His first new collection of short humor in fifteen years is classic Woody Allen. Zero Gravity is the fifth collection of comic pieces by Woody Allen, a hilarious prose stylist whose enduring appeal readers have savored since his classics Getting Even, Without Feathers, Side Effects, and Mere Anarchy. This new work combines pieces that have appeared in The New Yorker along with...(展开全部)

Quantum gravity is perhaps the most important open problem in fundamental physics. It is the problem of merging quantum mechanics and general relativity, the two great conceptual revolutions in the physics of the twentieth century. The loop and spinfoam approach, presented in this 2004 book, is one of the leading research programs in the field. The first part of the book discus...(展开全部)

Quantum gravity poses the problem of merging quantum mechanics and general relativity, the two great conceptual revolutions in the physics of the twentieth century. The loop and spinfoam approach, presented in this book, is one of the leading research programs in the field. The first part of the book discusses the reformulation of the basis of classical and quantum Hamiltonian ...(展开全部)

A Guardian Best Book of the 21st Century The audacious and elegiac second installment in her 'living autobiography' on writing and womanhood, from the twice-Man Booker Prize-shortlisted author of Hot Milk and Swimming Home 'Extraordinary and beautiful, suffused with wit and razor sharp insights' Financial Times Following the acclaimed Things I Don't Want to Know, Deborah Levy r...(展开全部)

傅士德（Richard J.Foster），阿兹塞太平洋大学（Azusa Pacific University）教授，和尤金•毕德生（Eugene Peterson）并列北美两大具影响力的灵修作家。他的著作有：《属灵操练礼赞》、《简朴生活真谛》、《属灵操练之旅》、《祷告真谛》等。

傅士德（Richard J.Foster），阿兹塞太平洋大学（Azusa Pacific University）教授，和尤金•毕德生（Eugene Peterson）并列北美两大具影响力的灵修作家。他的著作有：《属灵操练礼赞》、《简朴生活真谛》、《属灵操练之旅》、《祷告真谛》等。