Green Star Series

• Under the Green Star (1972)
• When the Green Star Calls (1973)
• By the Light of the Green Star (1974)
• As the Green Star Rises (1975)
• In the Green Star's Glow (1976)

An anonymous, rich, crippled American gets books from the Tibetan monastery at Qanguptoy, from which he learns the art of soul projection. Longing for an adventure, and restricted by his earthly body, he looks at the sky one night and sees a green star (referred to later as The Green Star) and projects his soul to a cloud-covered planet revolving around it. The texts of the five volumes of the series are ostensibly transcripts of first-person narratives by the anonymous author recounting his adventures: the first after he took the (preserved) body of Chong The Mighty, and returned to earth after Chong was killed by a brigand; the rest, in his second incarnation as Karn The Hunter (where the author had taken over Karn's just-dead body). Through a bequest, these come into the hands of Lin Carter, who "edits" them for publication.

The surface of the planet revolving about The Green Star is largely covered by a tropical forest of multi-mile-high trees in whose tops are the main cities including Phaolon, Ardha and Kamadhong. The human inhabitants of these arboreal cities, known as Laonese, use large moths (dhua) to draw carriages, and dragonflies (zaiphs) for individual transport. Other (than Laonese) races of humans include:

• the savage albino troglodyte dwellers among the huge trees' roots (near the forest's ground level)
• the Blue Barbarians, a nomadic race who at unpredictable intervals are afflicted by an insanity (the entire race is affected) causing them to destroy and pillage whatever cities are in their vicinity
• the Komarians and Tharkoonians, basically similar to the Laonese, but dwelling on islands in an inland sea (for which the Laonese use the word zand, though they generally think it legendary) known as the Sea Of Komar
• the black humans of Calidar, who think of themselves as the only humans and of the Laonese as mere beasts with human shape; Calidar has many captive Laonese (and their descendants) whom the ebon men use for experiments
• the Kaloodha, an ancient race of winged humanoids who are almost extinct (the one survivor is over a million years old) due to foolish experiments to make them immortal

The planet is closer to The Green Star than the earth is to the sun; it is protected from being seared by a thick, almost unbroken cloud-cover. However, the cloud-cover does not protect the planet from tidal effects (observable in the Sea of Komar).

In all of the novels, it is assumed (by the author) that humans retain terrestrial size; he confesses at two points in the series that he does not know if this is the case, or if humans are miniaturised with other creatures retaining terrestrial size (in one of the two places, he believes this may make more sense).

• Lin Carter at the Internet Speculative Fiction Database