Relic

Read Relic Storyline:

The last known human searches the galaxy for companionship in a brilliant standalone novel from the legendary author of the Pip & Flinx series. Once Homo sapiens reigned supreme, spreading from star system to star system in an empire that encountered no alien life and thus knew no enemy . . . save itself. As had happened many times before, the basest, most primal human instincts rose up, only this time armed with the advanced scientific knowledge to create a genetically engineered smart virus that quickly wiped out humanity to the last man. That man is Ruslan, the sole surviving human being in the universe. Rescued from the charnel house of his home planet by the Myssari—an intelligent alien race—Ruslan spends his days as something of a cross between a research subject and a zoo attraction. Though the Myssari are determined to resurrect the human race, using Ruslan's genetic material, all he wants for himself and his species is oblivion. But then the Myssari make Ruslan an extraordinary offer: In exchange for his cooperation, they will do everything in their considerable power to find the lost home world of his species - an all-but-mythical place called Earth - and, perhaps, another living human. 
Thus begins an epic journey of adventure, danger, heartbreak, and hope, as Ruslan sets out in search of a place that may no longer exist - drawn by the slimmest yet most enduring hope.