Jeff Carver is a hard sf writer who gets it right-his science and his people are equally convincing. NEPTUNE CROSSING combines his strengths, from a chilling look at alien machine intelligence, to cutting-edge chaos theory, to the pangs of finite humans in the face of the infinite. If you like intriguing ideas delivered in an exciting plot, this is your meat.

SF is a controlled way to think and dream about the future. An integration of the mood and attitude of science (the objective universe) with the fears and hopes that spring from the unconscious. Anything that turns you and your social context, the social you, inside out. Nightmares and visions, always outlined by the barely possible.

There was a blithe certainty that came from first comprehending the full Einstein field equations, arabesques of Greek letters clinging tenuously to the page, a gossamer web. They seemed insubstantial when you first saw them, a string of squiggles. Yet to follow the delicate tensors as they contracted, as the superscripts paired with subscripts, collapsing mathematically into concrete classical entities - potential; mass; forces vectoring in a curved geometry - that was a sublime experience. The iron fist of the real, inside the velvet glove of airy mathematics.

Peter Watts delivers-solid, inventive hard sf about the deep sea, but as we've never seen before. This moves like the wind.

When the chemistry is right, all the experiments work.

If you are losing at a game, change the game.

The biggest mistake is being too afraid of making one.