Omnivore

Three scientists came to the mysterious planet Nacre to discover, to explore, to record. Utterly defenseless, they trekked through the grotesque jungle of multiform mushrooms and dense spore-clouds, hoping to unlock the secret of this strange world. The stunning climax of their mission was just the beginning of a complex drama in which their survival--and return to earth-could spell the extinction of humanity.

This is #1 in Of Man And Mantra.