
Across a Billion Years is a 1969 science fiction novel by American writer Robert Silverberg.

The Book of Skulls is a science fiction novel by Robert Silverberg, which was first published in 1972. It was nominated for the Nebula Award in 1972, and both the Hugo and Locus Awards in 1973.

Collision Course is a science fiction novel by American author Robert Silverberg, first published in hardcover in 1961 by Avalon Books and reprinted in paperback as an Ace Double later that year. Ace reissued it as a stand-alone volume in 1977 and 1982; a Tor paperback appeared in 1988. An Italian translation was also published in 1961, and a German translation later appeared. Silverberg planned the novel as a serial for Astounding Science Fiction, but John W. Campbell rejected the work and Silverberg eventually sold a shorter version to Amazing Stories, where it appeared in 1959.

The Dawning Light is a 1959 science fiction novel published under the name Robert Randall, collaborative pseudonym of American writers Robert Silverberg and Randall Garrett. It depicts the changes, after the events of The Shrouded Planet by the same authors, in the society of the fictional planet Nidor, a world perpetually covered in dense cloud, inhabited by humanoids resembling humans but differing in several respects, notably in being covered from head to foot in short downy fur. The technological level of the society is about that of Renaissance Europe, and has been that way for thousands of years.

Downward to the Earth is a 1970 science fiction novel by American writer Robert Silverberg. It is a tale of the quest for transcendence set on another planet, and includes references to Heart of Darkness, Joseph Conrad's classic tale of colonialism, including the name of Kurtz. Its title references Ecclesiastes 3:21 in the Bible.

Dying Inside is a science fiction novel by American writer Robert Silverberg. It was nominated for the Nebula Award in 1972, and both the Hugo and Locus Awards in 1973.

The Face of the Waters is a science fiction novel by American writer Robert Silverberg, first published in 1991.

The Gate of Worlds is an alternate history novel by American writer Robert Silverberg. It was first published by Holt, Rinehart & Winston in the United States in 1967. The first UK hardcover edition was published by Gollancz in 1978.

Gilgamesh the King is a 1984 historical novel by American writer Robert Silverberg, presenting the Epic of Gilgamesh as a novel. In the afterword the author wrote "at all times I have attempted to interpret the fanciful and fantastic events of these poems in a realistic way, that is, to tell the story of Gilgamesh as though he were writing his own memoirs, and to that end I have introduced many interpretations of my own devising which for better or for worse are in no way to be ascribed to the scholars".

Hawksbill Station is a science fiction novel by American writer Robert Silverberg. The novel is an expanded version of a short story first published in Galaxy Science Fiction in August 1967. The novel was published in 1968 and was released in the United Kingdom under the title The Anvil of Time.

Kingdoms of the Wall is a 1992 science fiction novel by American writer Robert Silverberg. It is set on a faraway planet inhabited by an alien race and in an undefined future. Its subject is the perpetual communal quest for knowledge in the face of hardship and wonders, which through the revelation of an unexpected and devastating truth results in the deconstruction and slaying of gods.

The Majipoor series is a series of novels and stories by American writer Robert Silverberg, set on the planet Majipoor. The setting is a mixture of science fiction and fantasy elements.

The Man in the Maze is a science fiction novel by American writer Robert Silverberg, originally serialized in the magazine, Worlds of If April in May 1968, and published in bookstores the following year. It tells the tale of a man rendered incapable of interacting normally with other human beings by his uncontrollable psychic abilities. The novel is inspired by Sophocles' play Philoctetes, with the roles of Odysseus, Neoptolemus and Philoctetes played by Boardman, Rawlins, and Muller, respectively.

The Masks of Time is a science fiction novel by American author Robert Silverberg, first published in 1968. It was a nominee for the Nebula Award in 1968.

"Nightfall" is a 1941 science fiction novelette by American writer Isaac Asimov about the coming of darkness to the people of a planet ordinarily illuminated by sunlight at all times. It was adapted into a novel with Robert Silverberg in 1990. The short story has been included in 48 anthologies, and has appeared in six collections of Asimov's stories. In 1968, the Science Fiction Writers of America voted "Nightfall" the best science fiction short story written prior to the 1965 establishment of the Nebula Awards, and included it in The Science Fiction Hall of Fame Volume One, 1929-1964.

"Nightwings" is a science fiction novella by American writer Robert Silverberg. It won the Hugo Award for Best Novella in 1969 and was also nominated for the Nebula Award in 1968. It won the Prix Apollo Award in 1976. "Nightwings" is the first in a trilogy of novellas, the next two being "Perris Way" (1968) and "To Jorslem" (1969). These three works were later collected into a single fixup in three sections, also titled Nightwings. According to Silverberg's introductions, the changes required to turn the three shorter works into a novel were relatively minor.

The Positronic Man is a 1992 novel by American writers Isaac Asimov and Robert Silverberg, based on Asimov's novelette "The Bicentennial Man".

Revolt on Alpha C is a juvenile science fiction novel by American writer Robert Silverberg, published by Crowell in 1955. It was Silverberg's first published book.

Roma Eterna is a science fiction fixup novel by American writer Robert Silverberg, published in 2003, which presents an alternative history in which the Roman Empire survives to the present day. Each of the ten chapters was first published as a short story, six of them in Asimov's Science Fiction, between 1989 and 2003.

The Second Trip is a 1972 science fiction novel by American writer Robert Silverberg. Prior to its publication by Doubleday, it was published in serialized form in Amazing Stories from July to September 1971.

The Seed of Earth is a science fiction novel by American writer Robert Silverberg, originally published in Galaxy Science Fiction in June 1962, and expanded as an Ace Double in 1962. The novel takes place in the near future, and tells the story of a group of individuals, selected randomly by a government-sponsored lottery, who are forced to leave Earth and establish a colony on a distant world. Once there, four of the colonists are abducted by the planet's native inhabitants, and must put aside their differences and work together in order to survive.

Shadrach in the Furnace is a science fiction novel by American writer Robert Silverberg, first published by Bobbs Merrill in 1976. The novel was nominated in 1976 for the Nebula Award, and in 1977 for the Hugo Award.

The Shrouded Planet is a 1957 science fiction novel published under the name "Robert Randall", actually the collaborative work of American writers Robert Silverberg and Randall Garrett. It consists of three linked stories, each originally published separately in the magazine Astounding Science Fiction. Linking chapters were added for book release. The first book printing, by Gnome Press in New York, was small and did not sell well. This and the sequel novel, The Dawning Light, were reprinted 25 years later.

Son of Man is a science fiction novel by American writer Robert Silverberg, published in 1971. The book is about Clay, a 20th-century man, who travels billions of years into the future and meets humanity in its future forms. Some of the issues discussed in the book are sexuality, telepathic communication between people, physical prowess or frailty, division of humans by caste or ability, and the preservation of ancient wisdom, among other things.

Starborne is a 1996 science fiction novel by American writer Robert Silverberg, an expansion of his 1973 story "Ship-Sister, Star-Sister".

Starman's Quest is a science fiction novel by American writer Robert Silverberg. It was published in 1958 by Gnome Press in an edition of 5,000 copies, of which only 3,000 were bound. It was reprinted as a second edition in hardcover by Meredith Press in 1969.

Thorns is a science fiction novel by American author Robert Silverberg, published as a paperback original in 1967, and a Nebula and Hugo Awards nominee.

Those Who Watch is a science fiction novel by American writer Robert Silverberg, first published by Signet in 1967. The novel concerns a trio of alien explorers, each one surgically altered so as to appear outwardly human, who find themselves separated, and permanently stranded on Earth, after their ship explodes while hovering in low orbit. Each of the aliens is injured during the accident, and all are taken in and nursed back to health by kindly human beings.

The Time Hoppers is a science fiction novel by American writer Robert Silverberg, first published by Doubleday in 1967. The plot concerns Joe Quellen, a 25th-century bureaucrat charged with investigating "hoppers", travelers from the future whose presence in the past has been documented for hundreds of years, and his brother-in-law, Norman Pomrath, an unemployed blue collar worker who ends up being presented with an opportunity to travel back in time.

A Time of Changes is a 1971 science fiction novel by American writer Robert Silverberg. It won the Nebula Award for that year, and was also nominated for the 1972 Hugo and Locus Awards.

Time of the Great Freeze is a science fiction novel by American author Robert Silverberg, first published by Holt, Rinehart and Winston in 1964. The novel concerns a group of explorers, living in an underground city somewhere in North America three hundred years after an environmental catastrophe has triggered a new Ice Age. They decide to leave their haven after making contact with London via radio transmissions. Once on the surface, they set out across the mostly frozen wasteland of North America, and eventually across the icy surface of the Atlantic Ocean, and along the way encounter descendants of survivors of the original catastrophe who were unable to seek refuge underground.

To Live Again is a 1969 science fiction novel by American writer Robert Silverberg.

Tower of Glass is a science fiction novel by American writer Robert Silverberg, published in 1970. It was nominated for the Nebula Award in 1970, and for both the Hugo and Locus Awards in 1971.

Up the Line (1969) is a time travel novel by American science fiction author Robert Silverberg. The plot revolves mainly around the paradoxes brought about by time travel, though it is also notable for its liberal dosage of sex and humor. It was nominated for a Nebula Award for Best Novel in 1969, and a Hugo Award for Best Novel in 1970, finishing behind Ursula K. Le Guin's The Left Hand of Darkness for both awards. It was originally serialized in Amazing Stories in 1969, then issued as a paperback original by Ballantine Books later in that year.

The World Inside is a science fiction novel by American writer Robert Silverberg, published in 1971. The novel originally appeared as a series of shorter works in 1970 and 1971, all but one published in Galaxy, including the Hugo nominated novella "The World Outside". The World Inside was nominated for a Hugo Award in 1972, although Silverberg declined the nomination.