From Russia With Love
by Ian Fleming. This is the fifth, and so far the best, of the "Bond, James Bond" books .
This book takes Bond to Istanbul and into a well thought-out plan by SMERSH to kill him and discredit MI-6. The bait is a beautiful Russian corporal and decoding device. The plot takes place in Istanbul and then on the Orient Express train to Paris. They are followed by, and eventually confronted by SMERSH's chief assassin.
The movie adaptation of this book was my favorite of the Bond movies, and very faithful to Fleming's story.