In that Book and in its sequel, Humans, Sawyer showed us the Neanderthal version of Earth in loving detail-a tour de force of world-building; a masterpiece of alternate history.
Now, in Hybrids, Ponter Boddit and his Homo sapien lover, geneticist Mary Vaughan, are torn between two worlds, struggling to find a way to make their star-crossed relationship work. Aided by banned Neanderthal technology, they plan to conceive the first hybrid child, a symbol of hope for the joining of their two versions of reality.
But after an experiment shows that Mary's religious faith--something completely absent in Neanderthals - is a quirk of the neurological wiring of Homo sapiens' brains, Ponter and Mary must decide whether their child should be predisposed to atheism or belief. Meanwhile, as Mary's Earth is dealing with a collapse of its planetary magnetic field, her boss, the enigmatic Jock Krieger, has turned envious eyes on the unspoiled Eden that is the Neanderthal world . . . .