Good Lord, but this is a bad book. The plotting is simplistic, the characters are barely one-dimensional, the action non-existent, the cliché dialogue endless, the MacGuffin "space technology" laughable...
Tibet from 1958 through the 1960's is screaming out for a great spy story - but this sure ain't it. In fact, the story has no relationship to the Tibetan situation at all; Tibet just serves as the poorly-researched backdrop for a story that could have just as easily been set in Cold War Yugoslavia or Nazi-occupied Belgium or bloody anywhere.
Like so many or the more poorly written heroes in this particular spy/action genre, Paul Chavasse is in fact terrible at his job - all he's really good at is escaping, because he's had so much practice getting captured over and over again. Otherwise, he has no influence on events whatsoever - everything hinges on either lucky breaks, bad breaks or his frequent mistakes (getting lost and riding around in circles; having his important conversations overheard because he never checked who might be listening; realizing too late that "he should have known...the whole damn thing had been too easy...").
So, y'know, just B-A-D.