 "The Price of the Phoenix", by Sondra Marshak and Myrna Culbreath, and "Planet of Judgment", by Joe Haldeman, followed in 1977.After completing his second "Star Trek" novel, "World Without End" (1979), Haldeman was "fed up…" and left the "Star Trek" "enterprise" at "warp factor five".Haldeman said he wrote his first novel to explore writing when all the "characters are already known to the readers," but did not expect to do a second.