Excession

Two and a half millennia ago, the artifact appeared in a remote corner of space, beside a trillion-year-old dying sun from a different universe. It was a perfect black-body sphere, and it did nothing. Then it disappeared. Now it is back. By the author of "Feersum Endjinn". The Excession has returned but the only person who is aware of its potential is living out her death in the immense Sleeper Service ship. The Excession is something the culture must understand better - before it falls into less understanding hands.