Although an Algerian Love Knot doesn’t appear in the novel, a faithful adaptation of Casino Royale on the big screen was a long time coming.
The novel was written by Ian Fleming at his holiday home in Jamaica and published in 1953, introducing the world to James Bond. The book was a success in the UK, spawning the series of books that followed and Fleming sold the film and television rights to this first book quite early on.
The first adaptation to hit the screen was in 1954. This television play was part of the Climax! Series on CBS and starred Barry Nelson as Bond, although he was a CIA agent.
The rights to the other Bond films were picked up by Harry Salzman and Cubby Broccoli, who went on to start the official film series with Dr No starring Sean Connery. Meanwhile, the rights to Casino Royale were picked up by Charles K. Feldman. He discarded the idea of making a film with Sean Connery and instead decided to make it a comedy, released in 1967. The film starred David Niven, Peter Sellers and many others but is a complete mish mash of ideas.
Eventually MGM obtained the rights to Casino Royale after a lawsuit brought about by Kevin McClory. He had produced Thunderball owing to an earlier lawsuit in which it was found that Fleming had based his novel of the same name on a script that McClory had worked on.
His claim that he was entitled to produce a James Bond series backed by Sony Pictures resulted in the rights to Casino Royale being sold to MGM and when the producers of the Bond films wanted to take the series in a new direction they opted for a reboot: and Casino Royale made it to the big screen.
