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.

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