"Nightfall" was first published in 1947 in King's College Review. Sir Arthur C. Clarke (1917-2008) is regarded as one of the most-influential science fiction writers of all time. He was named a Grand Master by the Science Fiction and Fantasy Writers of America, and was inducted into the Science Fiction and Fantasy Hall of Fame.

"Breaking Strain" was first published in the December 1949 issue of Thrilling Wonder Stories. It was one of the stories incorporated into the film and novel, 2001: A Space Odyssey. Sir Arthur C. Clarke (1917-2008) is regarded as one of the most-influential science fiction writers of all time. He was named a Grand Master by the Science Fiction and Fantasy Writers of America, and was inducted into the Science Fiction and Fantasy Hall of Fame.

"Second Dawn" was first published in the August 1951 issue of Science Fiction Quarterly. Sir Arthur C. Clarke (1917-2008) is regarded as one of the most-influential science fiction writers of all time. He was named a Grand Master by the Science Fiction and Fantasy Writers of America, and was inducted into the Science Fiction and Fantasy Hall of Fame.

"Refugee" was first published in the July 1955 issue of The Magazine of Fantasy and Science Fiction. Sir Arthur C. Clarke (1917-2008) is regarded as one of the most-influential science fiction writers of all time. He was named a grand master by the Science Fiction and Fantasy Writers of America and was inducted into the Science Fiction and Fantasy Hall of Fame.

Maelstrom II was first published in the April 1962 issue of Playboy. Sir Arthur C. Clarke (1917-2008) is regarded as one of the most-influential science fiction writers of all time. He was named a Grand Master by the Science Fiction and Fantasy Writers of America, and was inducted into the Science Fiction and Fantasy Hall of Fame.