On a more positive note, Tiffany Case is an excellent Bond girl who plays an integral part in the book. The relationship that develops between her and Bond is highly convincing and well-observed and the book is rich in dialogue between the two. On the topic of marriage:
Bond: "Most marriages don't add two people together. They subtract one from the other."
Tiffany: "But it depends what you want it to add up to. Something human or something inhuman. You can't be complete by yourself."
As suggested by the syndicate's comparatively (in Bond terms) modest ambitions, Diamonds Are Forever lacks a really good principle villain, but it does have well-portrayed minor contenders in the form of the duo Wint and Kidd, two violent and ruthless killers. There are some tense moments in the novel and although there is no real action until well over half way through it, once it starts, it is almost non-stop until the end.
One of the outstanding features of this adventure remains the way Fleming wrote the character of Tiffany. Her relationship with Bond adds humanity and life to Diamonds Are Forever. --Jamie Campbell
"James Bond is one of the most cunningly synthesized heroes in crime fiction" (Observer)
"A brilliant story that maintains the promise of an extremely clever introduction" (Manchester Evening News)
"Once again Ian Fleming has brought it off" (Birmingham Post)