Robert Silverberg

Up the Line 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 …

Simeon Krug's obsession is to see a tower built, on kilometre high, that will reach out to answer the voice from space. The Androids are his tools; superb, man-like creations of Man. The Androids take Krug for their God, and seek to become one with flesh-and-blood mankind through his wisdom. But Krug is not God - and …

Discusses, among other topics relating to the redwood and the giant sequoia, their discovery and misuse and the chronic conflict between redwood lumbermen and conservationists.

The Masks of Time is a science fiction novel by American authorRobert Silverberg, first published in 1968. It was a nominee for the Nebula Award in 1968. It was published in the United Kingdom under the title Vornan-19.