The Radix Tetrad is a group of four science fiction books by A. A. Attanasio. The first novel, the Nebula Award-nominated Radix, was published in 1981, and the last novel, The Last Legends of Earth, was published in 1989.
The Tetrad Radix (1981) In Other Worlds (1984) Arc of the Dream (1986) The Last Legends of Earth (1989)
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