Expedition - Lioness Tracks, #4

Johanna returns to Earth from her exploration mission with a heavy burden-the survival of two peoples is at stake, menaced by an all-devouring creature. Now she must convince mankind that helping the foreigners is rewarding-and at the same time, she must defeat the human opponents who threaten to destroy everything she ever built. Time is running out-will she be able to return, and if so, will she still find someone to save?