It isn't hard to see why Ludlum is a legend in this genre. I have to admit that I haven't read any of the Bourne novels, but I have seen the films and I admire the originality of plot and how successful they are. The depth of detail that Ludlum goes into when writing these is astonishing, especially as the novel is over 600 pages. Truly this was an original, fast paced spy novel that didn't disappoint.
In the Ambler Warning we meet Harrison Ambler, who finds himself adrift in a world he doesn't quite understand and doesn't quite remember. He has to try and figure out who he is and who had tried to secret him away for the rest of his life.
The thing I liked most about this I think was the constant change of location and the beautiful and vivid descriptions that Ludlum gives of France and then Switzerland. This really was like watching a film in my head and I thoroughly enjoyed it. The only criticism that one can level at it, if at all, is that it is a little similar in principle to the Bourne trilogy, but the differences far outweighed any similarity. Easy to read and well worth it if you do like a good spook novel.