Send No More Roses by Eric Ambler. In my opinion, the only thriller writer worth reading. A postmodernist avant le nom, his untrustworthy narrators manage to convey absolute conviction that the events are real, even while the reader knows that they are probably lying about all the details. He doesn’t load up with technical detail in the manner of Tom Clancy et al, but does a much better job of convincing you that he has it all at his fingertips.