Being far above the earth is usually described by astronauts in religious terms of awe and wonder, but as Kiefer shows in his well-studied, aching, but occasionally meandering debut novel, The Infinite Tides, there's always a point where you have to come down. Back from a stint on the International Space Station, Capt. Keith Corcoran must come to terms with his daughter's death and his divorce both of which occurred while he was in orbit and the mathematical absolutes of his job give way to the emotional helplessness of his personal life. The writing is often beautiful, but it could have been tethered to a stronger plot. B

