The Prophecy of Worlds - Exoplanet Survey Omnibus Edition. The Exoplanet Survey, #5.5

Humanity's greatest discoveries were meant to secure its future. Instead, they reveal how close the galaxy stands to losing everything. Across five gripping novels, this omnibus follows Professor Sandy Stewart and the crews of First Dawn, Hippocrates, and Unity as they confront mysteries that stretch from ancient prophecies to the frontiers of genetic science. What begins as exploration becomes a battle for survival.
Not against an empire or an enemy fleet, but against the silent, indifferent forces written into the fabric of life itself. On a dead world where every plant, animal, and microbe has vanished, Sandy's team uncovers the unthinkable. A genetically-engineered organism that hunts DNA itself. It grows across plastic, devours genomes in minutes, and leaves behind nothing but dust. As the crew races to understand the extinction event that erased an entire civilisation, they realise the truth is far worse than a pandemic...
And it survived. With no cure, no immunity, and zero margin for error, Sandy must hold the line between scientific curiosity and catastrophe. One mistake could doom not just a planet, but every living world humanity has ever touched. Blending hard science, military realism, emotional depth, and sweeping interstellar mystery, this five-book collection charts the journey of ordinary people facing impossible choices and the hope, courage, and sacrifice required to protect a fragile civilisation standing at the edge of the unknown.
The dead world is only the beginning. What they discover next will decide the fate of them all.