A collection of all three volumes of Cassegrain's "Trap on Zarkass!" Plus 12 pages of extra art by Cassegrain.
From the publisher:
On the surface of the planet Zarkass. Mysterious triangular flying machines disturb the harmony between the native population and the established human colony. Who is driving these Triangles and what is the purpose of their maneuvers in the protectorate airspace?
Escorted by a crew of natives, two agents as dissimilar as they are incompatible with each other are themselves dispatched there: Louis, a delicate and refined scientific officer, and Marcel, her rough and stocky guide and teammate. Their cover: studying fauna, flora, and Zarkassian customs. Their unofficial mission: reach the zone where one of the alien ships seems to have crashed. But in the lush and threatening jungle of Zarkass, it's not long before the two young women suspect the other is concealing their real reason for being there...