He earned a bachelor's degree in political science and a MFA from the University of California, Los Angeles and currently resides in Prescott, Arizona, with his wife.
Foster may be best known for his science fiction novels set in the Humanx Commonwealth, an interstellar ethical/political union of species including humankind and the insectoid Thranx. Many of these novels feature Philip Lynx ("Flinx"), an empathic young man who has found himself involved in something which threatens the survival of the Galaxy. Flinx's constant companion since childhood is a minidrag named Pip, a flying, empathic snake capable of spitting a highly corrosive and violently neurotoxic venom.
One of Foster's better-known fantasy works is the Spellsinger series, in which a young musician is summoned into a world populated by talking creatures where his music allows him to do real magic whose effects depends on the lyrics of the popular songs he sings (although with somewhat unpredictable results).
Many of Foster's works have a strong ecological element to them, often with an environmental twist. Often the villains in his stories experience their downfall because of a lack of respect for other alien species or seemingly innocuous bits of their surroundings. This can be seen in such works as Midworld, about a semi-sentient planet that is essentially one large rainforest, and Cachalot, set on an ocean world populated by sentient cetaceans. Foster usually devotes a large part of his novels to descriptions of the strange environments of alien worlds and the coexistence of their flora and fauna. Perhaps the most extreme example of this is Sentenced to Prism, in which the protagonist finds himself trapped on a world where life is based on silicon rather than carbon, as on Earth.
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