The Currents of Space

Blurb

The Currents of Space is a science fiction novel by the American writer Isaac Asimov. It is the second of three books labeled the Galactic Empire series, though it was the last of the three he wrote. Each occurs after humans have settled many worlds in the galaxy — after the second wave of colonization that went beyond the Spacer worlds — and before the era of decline that was the setting for the original Foundation series. Each of the three is only loosely connected to other works, being separated by a fairly large span of centuries.