<p>MANKIND HAS REACHED THE STARS. <br>Two hundred years after the fall of Mechanism, human society has achieved a kind of stability. There are colonies beneath the oceans, throughout the solar system, and beyond: on extrasolar planets. Vast hemi-relativistic ships connect these colonies, travelling at half the speed of light. Or rather they <i>would</i>, if the ominous presence of the alien Watchkeepers had not led to an enforced moratorium on interstellar travel.<br><br>But when a seemingly impossible radio signal reaches the colony Crucible, everything changes:<br><br>SEND NDEGE<br><br>It''s origin is unpopulated, unexplored space. No one could be there - at least, not if they travelled using human technology - so who could have sent it? How did they get there? And what use do they have for the disgraced scientist Ndege Akinya?<br><br>Finding the answers will require one of the greatest expeditions humankind has ever launched, a journey further than ever attempted before, conducted u