MacLeod's final book in the Lightspeed trilogy is nothing short of celestial. . . The Fermi have departed from the rocky worlds, but they still haunt the gas giants. Their long-term intentions remain unknown. Hurled into the past by a time-slip, John Grant and his onboard AI navigate the long way back. They return to the present in a distant system, where they find Terre Nouveau, a human settlement already two hundred...