Most amateur astronomers – and many of those with similar interests but who are not currently practising observers – have only a sketchy understanding of space flight. This book provides an introduction to its mechanics. The beauty of this book, written by an engineer who is also an accomplished science writer, is that it covers the subject comprehensively, and yet is almost entirely descriptive and non-mathematical. It deals with all aspects of space flight, from how to leave the Earth (including the design of the rocket, mission planning, navigation and communication), to life in space and the effects of weightlessness. The book also includes sections describing how an amateur can track satellites and understand their orbital parameters.

ONE OF WASHINGTON POST'S NOTABLE NONFICTION BOOKS OF THE YEAR A bracingly honest exploration of why there are still so few women in STEM fields—“beautifully written and full of important insights” (Washington Post). In 2005, when Lawrence Summers, then president of Harvard, asked why so few women, even today, achieve tenured positions in the hard sciences, Eileen Pollack set out to find the answer. A successful fiction writer, Pollack had grown up in the 1960s and ’70s dreaming of a career as a theoretical astrophysicist. Denied the chance to take advanced courses in science and math, she nonetheless made her way to Yale. There, despite finding herself far behind the men in her classes, she went on to graduate summa cum laude, with honors, as one of the university’s first two women to earn a bachelor of science degree in physics. And yet, isolated, lacking in confidence, starved for encouragement, she abandoned her ambition to become a physicist. Years later, spurred by the suggestion that innate differences in scientific and mathematical aptitude might account for the dearth of tenured female faculty at Summer’s institution, Pollack thought back on her own experiences and wondered what, if anything, had changed in the intervening decades. Based on six years interviewing her former teachers and classmates, as well as dozens of other women who had dropped out before completing their degrees in science or found their careers less rewarding than they had hoped, The Only Woman in the Room is a bracingly honest, no-holds-barred examination of the social, interpersonal, and institutional barriers confronting women—and minorities—in the STEM fields. This frankly personal and informed book reflects on women’s experiences in a way that simple data can’t, documenting not only the more blatant bias of another era but all the subtle disincentives women in the sciences still face. The Only Woman in the Room shows us the struggles women in the sciences have been hesitant to admit, and provides hope for changing attitudes and behaviors in ways that could bring far more women into fields in which even today they remain seriously underrepresented.

This is a provocative account of the astounding new answers to the most basic philosophical question: Where did the universe come from and how will it end?

Henry George died fighting one of the most corrupt political organizations of the civilized world — a sufficient epitaph for any worthy man. But he has larger claims to respect and consideration. He made a creditable attempt to solve the root-problem of material life — poverty, — and his just-published posthumous book, " The Science of Political Economy," excites that pathetic interest which attaches to the memory of one who tried to aid his fellowman. He was eloquent, but he was free from the hysteria of demagogy. His sympathies, born of bitter vicissitude, were acute, but they were tempered with reason. He believed in the equality of opportunity ; but he believed also (as an American and an individualist) in the natural inequality of capacity. When he saw the industrial evils of the Old World reappear in one of the richest and fairest parts of the New — commercial depression, involuntary idleness, wasting capital, pecuniary distress, want, suffering, anxiety, — he was startled, and he set about to discover the cause. We value him for what he tried to do. "Progress and Poverty " was an immensely interesting and attractive book on a seemingly sapless science. It struck fire from flint, and lifted the author from obscurity to world-wide celebrity. Emerson says that every man is eloquent in that which he understands. It would be, perhaps, truer to say that every man is eloquent in that in which he fervently believes, and George believed that he had given a message. To quote his own words: " On the night on which I finished the final chapter of 'Progress and Poverty,' I felt that the talent entrusted to me had been accounted for — was more fully satisfied, more deeply grateful, than if all the Kingdoms of the earth had been laid at my feet." No one doubts his sincerity, his intellectual integrity, the cleanliness of his soul. His expectations were infinite, his faith simple. The poverty of the world lay not in Nature but in a vicious economic system ; and he thought that he had found a "sovereign remedy" which would "raise wages, increase the earnings of capital, extirpate pauperism, abolish poverty, give remunerative employment to whoever wishes it, afford free scope to human powers, lessen crime, elevate morals and taste and intelligence, purify government, and carry civilization to yet nobler heights."

Metaphysics is one of the principle works of Aristotle and the first major work of the branch of philosophy with the same name. Many of the earliest books, particularly those dating back to the 1900s and before, are now extremely scarce and increasingly expensive. Pomona Press are republishing these classic works in affordable, high quality, modern editions, using the original text and artwork.