The novel “Reward for Retief” by Keith Laumer was published for the first time in 1989. It’s part of the Retief series.
The novel “Titan” by John Varley was published for the first time in 1979. It won the Locus Award as the best science fiction novel of the year. It’s the first novel of the Gaea trilogy.
The novel “The Doomsday Genie” by Frank P. Ryan was published for the first time in 2007. When some people get hit by a mysterious disease, a task force of scientists is formed to discover its nature and find a cure. The characteristics of this disease are different from any known ones making their research difficult but its mortality rate is incredibly high so they need to hurry.
The novel “The Triumph of Time”, also known as “A Clash of Cymbals”, by James Blish was published for the first time in 1958. It’s the fourth novel in the “The Cities in Flight” tetralogy, following “Earthman, Come Home” in its internal chronology.
The novel “A Spectre Is Haunting Texas” – in some editions “spectre” is spelled “specter” – by Fritz Leiber was published for the first time in 1968. It was originally published in three parts in the magazine “Galaxy Science Fiction” and the following year it was published as a book.