The wandering variables

"Dr. Tandy Venner is an irreplaceable asset to the Charter Worlds Union. Much too valuable to go off on an unexpected vacation by herself. So Jano Kegan, an operative of Charter Worlds, went along on a Euphor Tek team. But he and Dr. Venner got more than they bargained for. Attempted kidnapping, mind-control, out-of-bounds programming ... not quite what was promised. Before they know it, Venner and Kegan are off on a wild odyssey, breaking all the rules to find out what Eupor's really all about."@en
""Dr. Tandy Venner was an irreplacable asset to the Charter Worlds Union, so, when she decided to take a mind-bending vacation with a Euphor Trek team, Jano Kegan was sent along to keep an eye on her. To qualify for the safari across that mad planet, he too had to submit to the Trekkers' mental conditioning. What was not on the tour program was the unwritten sidetrack their guide had planned for Tandy. What was not on the guides' secret detour was the planet's own out-of-bounds programming. And what was not on any of them was the eccentricity of two brilliant vacationers breaking all the rules to find out what Euphor was really all about."--Back cover."@en