I can't pick a favourite so I'll just list some books I love that might not be as well known as some others here. * Last and First Men, by Olaf Stapledon * Wa

I can't pick a favourite so I'll just list some books I love that might not be as well known as some others here. * Last and First Men, by Olaf Stapledon * Way Station, by Clifford D. Simak * The Gap (series), by Stephen Donaldson * The Golden Apples of the Sun, by Ray Bradbury * Tau Zero, by Poul Anderson