Xeelee

Half a million years in the future, on a dead, war-ravaged world at the centre of the Galaxy, there is a mile-high statue of Michael Poole.
Poole, born on Earth in the fourth millennium, was one of mankind's most influential heroes. He was not a warrior, not an emperor. He was an engineer, a builder of wormhole transit systems. But Poole's work would ultimately lead to a vast and destructive conflict, a million-year war between humanity and the enigmatic, powerful aliens known as the Xeelee.