A. A. Attanasio (born 1951) is an American science fiction and fantasy author known for his richly detailed, imaginative worlds and complex narratives. He has a distinctive literary style that often incorporates elements of myth, history, and metaphysics. Attanasio's notable works include the Radix Tetrad series, starting with the novel "Radix," which explores themes of consciousness and evolution. Another of his well-known projects is "The Arthor series," a reimagining of the Arthurian legends blending historical fiction with fantasy. His writing weaves together adventure, philosophy, and a deep exploration of character, appealing to readers who enjoy intellectually stimulating and stylistically ambitious speculative fiction.