You can find the novel available in digital format at Goodreads and Amazon . Final Days by Gary Gibson – review - The Guardian
Gary Gibson’s Final Days is a gripping hard SF novel that follows characters uncovering a devastating future for humanity, blending complex scientific concepts with a fast-paced thriller. The story revolves around the discovery of a future Earth where life has ceased, leading to a desperate race to understand and prevent this impending doom. Download Final Days Gary Gibson epub