The last generation ark

Nine thousand people. Five hundred years. One frozen archive that was supposed to save them all, and one routine test that just came back dead.
Dr. Sable Okonkwo-Liang runs the Continuity Ledger aboard the generation ship Elpis, the office that has kept her colonys genetics healthy for nineteen generations by rationing a bank of frozen embryos across five centuries of deep space travel. Six weeks from planetfall, she discovers that a decades-old radiation leak has silently destroyed most of what remains. The founding colonys genetic diversity, the one thing standing between a thriving settlement and slow, irreversible collapse, is failing. And the same week she uncovers it, her daughters own marriage petition is the first casualty of the new math.
With no way to manufacture what was lost and no time to grow a new solution, Sable has three options, and all of them cost someone something: force impossible pairings on people who never agreed to them, tell nine thousand people the truth and risk the panic that comes with it, or find a third way before the ships medical bay is sealed for landing and the choice is made for her. This is hard science fiction in the tradition of Project Hail Mary and The Martian, grounded in real population genetics and the brutal arithmetic of survival, but the real equation Sable has to solve isnt genetic. Its whether the people shes protecting deserve to be managed, or trusted.
If you love science fiction survival novels that ask what humanity is willing to sacrifice to make it to the other side, The Last Generation Ark will keep you up arguing with yourself past the last page. Read it today and find out what it really takes to become someones ancestor.