The title is a play on words, one meaning "the force which pulls" & the other being "extremely serious or important". It was serialized in Astounding Science Fiction, 4–7/53. Its 1st cloth publication was in '54. It was 1st published in paper in '58. Along with the novel itself, many editions (& most recent editions) of the book also include Whirligig World, an essay on creating the planet Mesklin that was published in the 6/53 Astounding. He published two sequels, a '70 novel called Star Light & a '73 short story called Lecture Demonstration. Mission of Gravity was nominated for a Retro Hugo Award for '54.For a profit & adventure Barlennan would sail thousands of miles across uncharted waters, into regions where gravity played strange tricks. He'd dare the perils of strange tribes & stranger creatures--even dicker with those aliens from beyond the skies, though the concept of another world was unknown to the inhabitants of the planet of Mesklin. But in spite of the incredible technology of the strangers & without regard for their enormous size, Barlennan had the notion of turning the deal to an unsuspected advantage for himself--a considerable enterprise for a being very much resembling a 15" caterpillar!

    She hatches an audacious plan--free a thief from a prison planet from which no one has ever returned, and use them to help steal back a priceless artifact.But Ingray and her charge return to her home to find their planet in political turmoil, at the heart of an escalating interstellar conflict. Together, they must make a new plan to salvage Ingray's future and her world, before they are lost to her for good.

    The new Thanatos is superbly competent, ends pain when he ends lives. But Satan is forging a trap for Luna, the woman Death loves.

    At the end of his life he becomes reclusive and cantankerous, refusing to appear before or interact with his legion of fans. Little did anyone know, Nathan was putting into motion his true, timeless legacy.Convinced that humanity cannot survive on Earth, his Arkwright Foundation dedicates itself to creating a colony on an Earth-like planet several light years distant. Fueled by Nathan's legacy, generations of Arkwrights are drawn together, and pulled apart, by the enormity of the task and weight of their name.

    Leisha Camden was genetically modified at birth to require no sleep, and her normal twin Alice is the control. Problems and envy between the sisters mirror those in the larger world, as society struggles to adjust to a growing pool of people who not only have 30 percent more time to work and study than normal humans, but are also highly intelligent and in perfect health. The Sleepless gradually outgrow their welcome on Earth, and their children escape to an orbiting space station to set up their own society. But Leisha and a few others remain behind, preaching acceptance for all humans, Sleepless and Sleeper alike. With the conspiracy and revenge that unwinds, the world needs a little preaching on tolerance.

    Clarke of Last and First Men. This masterpiece of science fiction by British philosopher and writer Olaf Stapledon (1886–1950) is an imaginative, ambitious history of humanity's future that spans billions of years. Together with its follow-up, Star Maker, it is regarded as the standard by which all earlier and later future histories are measured.The protagonist of this compelling novel is humanity itself, stripped down to sheer intelligence. It evolves through the ages: rising to pinnacles of civilization, teetering on the brink of extinction, surviving onslaughts from other planets and a decline in solar energy, and constantly developing new forms, new senses, and new intellectual abilities. From the present to five billion years into the future, this romance of humanity abounds in profound and imaginative thought.

    Kids, including her brother Stephen, have logged into the net, and cannot escape. Clues point to a mysterious golden city called Otherland, but investigators all end up dead.

    Helliconia is emerging from its centuries-long winter. The tribes of the equatorial continent emerge from their hiding places and are again able to dispute possession of the planet with the ferocious phagors. In Oldorando, love, trade and coinage are being redisovered,This is the first volume of the Helliconia Trilogy -- a monumental saga that goes beyond anything yet created by this master among today's imaginative writers.