Reward For Retief (jaime Retief Series #15)

Retief's latest mission is to Sardon, a wild, undeveloped planet whose inhabitants have a marked dislike for Terrans. The native, worm-like Pillars seem to have a strong desire to kill the incoming Terran diplomats. Worse, they are hiding something--something that threatens interplanetary peace. Intergalactic diplomat Jame Retief investigates the planet Sardon whose inhabitants have a marked dislike for Terrans and who also appear to be hiding something from outsiders