Landfall is a State of Mind — Douglas R. Mason

Rick Massey, newly-appointed as executive on the space freighter Zenobia, finds that there are more than simple navigational problems ahead. The ship is carrying the daughter of the fabulously powerful chairman of a commercial empire as his representative in a very delicate piece of trade negotiation. Other interests are determined that it will not succeed--there is a fifth column on board. Massey starts off prepared to dislike the girl, but is reluctantly brought to see that she is a very smooth operator. Not least, when he owes her his life.