The Levanter is a book I buy again and gain in order to re-read it, and of how many thrillers can one say that? Le Carré at his best writes this well. Chandler merits regular re-readings, as does Elmore leonard sometimes ('Glitz', 'La Brava'....). Who else?
The narrator of this story is a science graduate of the University of London, like Ambler himself, so the scientific detail is all accurate, unforced and down to earth. Ambler never wastes a word and yet somehow he manages to enter the mindset of the (anti-) hero who is blackmailed into joining a Palestinian terrorist organisation. He is not 'a man of violence' but in the end decisions have to be taken.
Ambler is a supremely cerebral novelist but that does not prevent him from writing very exciting stories. His characters are usually ambiguous which merely serves to make the stories more believable and indeed more enjoyable. When you've read this - and you must - try the 'Schirmer Inheritance', 'A Kind of Anger', 'Passage of Arms'. 'The Intercom Conspiracy'.......damn it all. Read them all.