What are your top 5 standalone Sci-fi books?

Earth has become a Utopia, guided by a strange unseen people from outer space whose staggering powers have eradicated war, cruelty, poverty and racial inequality. When the 'Overlords' finally reveal themselves, their horrific form makes little impression...

When Kris Kelvin arrives at the planet Solaris to study the ocean that covers its surface he is forced to confront a painful, hitherto unconscious memory embodied in the physical likeness of a long-dead lover. Others suffer from the same affliction and...

The science fiction masterpiece behind the cult classic films Bladerunner and Bladerunner 2049.World War Terminus had left the Earth devastated. Through its ruins, bounty hunter Rick Deckard stalked, in search of the renegade replicants who were his prey...

It's late in the 21st century and bioengineering is now so common that people are able to modify their minds in any way they wish. It is an era which has been shaped by information systems so vast that security, in any form, is easily breached. Now you...

Matthew Sobol is dead, but his final creation survives. It begins with a bizarre murder, where the only possible perpetrator happens to be dead. As more killings follow, the police are completely out of their depth. It falls to the unlikely partnership...