It doesn't appear as a standalone work, but is included with several collections. The story is a prequel to the events in The Hitchhiker's Guide To The Galaxy and has the young Zaphod Beeblebrox working as a salvage ship operator. He guides some bureaucrats to a crashed spaceship which may be leaking some hazardous materials. The bureaucrats are determined to "make it safe". The comic asides in the story include some of the time travel paradoxes which are a common running theme in Adams' SF work, and plenty of material about lobsters

    But mankind is too busy hating, stealing, scheming, and killing to care. As luminous green trails of cosmic dust and vapor stream across the heavens, blood flows beneath: nations wage all-out war, bitter strikes erupt, and jealous lovers plot revenge and murder. The earth slips past the comet by the narrowest of margins, but all succumb to the gases in its tail. When mankind wakes up, everyone is completely and profoundly different. An ill-fated romance between Willie Leadford and Nettie Stuart unfolds in a world buried in misery and bent on its own destruction. After the earth passes through the comet's tail, suffering, pettiness, and injustice melt away. Willie, Nettie, and everyone around them are reborn. They now see themselves and their world in a dramatically new and wonderful way.

    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.

    That was no handicap to the merchant princes, who came to Earth for soldiers and returned to the stars with the best the planet had to offer: the legionaries of the Roman Empire!

    He is an eternal warrior destined to combat the Dark Lord through all time for dominion of the Earth. Follow him, servant of a great race, as he battles his enemy down the halls of time, from the caves of our ancestors to the final confrontation under the hammer of nuclear annihilation.

    It is the monumental story of a Galactic Empire in decline, and the secret society of scientists who seek to shorten the inevitable Dark Age with the science of psychohistory. Now, with the permission -- and blessing -- of the Asimov estate, the epic saga continues.Fate -- and a cruel Emperor's arbitrary power -- have thrust Hari Seldon into the First Ministership of the Empire against his will. As the story opens, Hari is about to leave his quiet professorship and take on the all but impossible task of administering 25 million inhabited worlds from the all-steel planet of Trantor. With the help of his beautiful bio-engineered "wife" Dors and his alien companion Yugo, Seldon is still developing the science that will transform history, never dreaming that it will ultimately pit him against future history's most awesome threat.

    En route to an interplanetary research mission, a scientist is abducted by a strange, shadowy race of aliens and taken to a previously uncharted planet, a storehouse of information that would be invaluable--even to an Earth so advanced that time travel allows goblins, dinosaurs, even Shakespeare to coexist.

    The age of star formation is long past. Yet there is life here, feeding off the energies of the stellar remnants, and there is mind, a tremendous galaxy-spanning intelligence each of whose thoughts lasts a hundred thousand years. And this mind cradles memories of a long-gone age when a more compact universe was full of light... The 27th century: Proxima Centauri, an undistinguished red dwarf star, is the nearest star to our sun. How would it be to live on such a world?

    Over the centuries, cities and governments have risen and fallen beyond the concent's walls. Three times during history's darkest epochs violence born of superstition and ignorance has invaded and devastated the cloistered mathic community. Yet the avout have always managed to adapt in the wake of catastrophe, becoming out of necessity even more austere and less dependent on technology and material things. And Erasmas has no fear of the outside—the Extramuros—for the last of the terrible times was long, long ago.Now, in celebration of the week-long, once-in-a-decade rite of Apert, the fraas and suurs prepare to venture beyond the concent's gates—at the same time opening them wide to welcome the curious "extras" in. During his first Apert as a fraa, Erasmas eagerly anticipates reconnecting with the landmarks and family he hasn't seen since he was "collected." But before the week is out, both the existence he abandoned and the one he embraced will stand poised on the brink of cataclysmic change.Powerful unforeseen forces jeopardize the peaceful stability of mathic life and the established ennui of the Extramuros—a threat that only an unsteady alliance of saecular and avout can oppose—as, one by one, Erasmas and his colleagues, teachers, and friends are summoned forth from the safety of the concent in hopes of warding off global disaster. Suddenly burdened with a staggering responsibility, Erasmas finds himself a major player in a drama that will determine the future of his world—as he sets out on an extraordinary odyssey that will carry him to the most dangerous, inhospitable corners of the planet . . . and beyond.

     The Hugo Award-winning author of such groundbreaking and innovative novels as "Accelerando, Halting State," and "Saturn's Children" delivers a rich selection of speculative fiction- including a novella original to this volume- brought together for the first time in one collection, showcasing the limitless imagination of one of the twenty-first century's most daring visionaries.

    the reader observes, recollects, or participates in a range of personal experience including violent pain and disfigurement, sensory deprivation and overload, man-machine communion, the drug experience, the creative experience - and inter-personal relationships which include incest and assassination, father-son, leader-follower, human-pet, and lots more!The balance of galactic power in the 31st century revolves around Illyrion, the most precious energy source in the universe. The varied and exotic crew who sign up with Captain Lorq van Ray know their mission is dangerous, and they soon learn that they are involved in a deadly race with the charismatic but vicious leader of an opposing space federation. But they have no idea of Lorq's secret obsession: to gather Illyrion at the source by flying through the very heart of an imploding star.

    A hidden stargate hurls him and his passengers to the Well World, the master control planet for the cosmos created by the now-gone godlike race who designed the universe. Now someone wants to find the Well of Souls to seize control of all the cosmos--and it's up to Nathan to stop them.

    In this nightmare society, air pollution is so bad that gas masks are commonplace. Infant mortality is up, and everyone seems to suffer from some form of ailment.

    Works include:The Land That Time Forgot, The People That Time Forgot, Out of Time's Abyss

    When Greyboar, a professional strangler, discovers the Supreme Philosophy of Life, he becomes a new man--but how can a villain in good standing pay the bills with his philosophical exploration getting in the way? Then Greyboar's long-lost sister asks him to help persecuted dwarves escape their human oppressors.