On Her Majesty's Secret Service by Ian Fleming

Summary:
James Bond, 007, is fed-up with the Secret Service and is contemplating tendering his resignation when he runs into Countess Theresa "Tracy" di Vincenzo whipping through the streets of France in her car.  He saves her from committing suicide and her father attempts to force him to marry her.   Bond clearly states that he is not the marrying kind, nor is Tracy in the healthy mindset necessary for such an undertaking.

Back in England, Bond gets a lead on Blofeld's whereabouts and poses as Sir Hilary Bray in order to convince Blofeld to leave Switzerland.  While at the mountain resort Blofeld has been using for his headquarters, Bond encounters several young English women who are undergoing treatment for agricultural allergies.  Unbeknownst to the women, they're being brainwashed to use chemical warfare on Britain's agriculture.

Bond is able to stop Blofeld in time, but the villain escapes to fight another day.

Response:
Second in the so-called Blofeld Trilogy, I wish I had read these books in order. There are many references to previous adventures - including Casino Royale and Thunderball - that I understood because of the films, but still felt like I was missing some important information.

I was surprised by how closely the film followed the novel but was surprised by the emotional aspect of Bond.  After sleeping with Ruby, his internal monologue expresses regret at having to lie to her to get information. We see him seriously questioning why he does what he does and what he wants for his future.  In the film, it's very difficult to see this internal struggle.
Personally, I prefer the Character of Tracy Bond in the movie.  She's much more independent and I understand why Bond would marry her.  In the book, she's more of a secondary character who lets men make decisions for her. She's described in terms of how Bond reacts to her and not about her as an individual at all.

Written during the same time that the first Bond film, Dr. No, was being filmed, there's a sly reference to this film in the novel.  While dining at Piz Gloria, Irma Bunt tells Bond that they get all kinds of celebrities.  She then points out actress, Ursula Andress.