The Metamorphosis of Prime Intellect
Lawrence had ordained that Prime Intellect could not, through inaction, allow a human being to come to harm. But he had not realized how much harm his super-intelligent creation could perceive, or what kind of action might be necessary to prevent it. Caroline has been pulled from her deathbed into a brave new immortal Paradise where she can have anything she wants, except the sense that her life has meaning.
Now these two souls are headed for a confrontation which will force them to weigh matters of life and death before a machine that can remake — or destroy — the entire Universe.