Casino Royale is the first novel by the British author Ian Fleming. Published in 1953, it is the first James Bond book, and it paved the way for a further eleven novels by Fleming, followed by numerous continuation Bond novels by other authors.

The story concerns the British secret agent James Bond, gambling at the casino in Royale-les-Eaux to bankrupt Le Chiffre, the treasurer of a French union and a member of the Russian secret service. Bond is supported in his endeavours by Vesper Lynd, a member of his own service, as well as Felix Leiter of the CIA and René Mathis of the French Deuxième Bureau.

Fleming used his wartime experiences as a member of the Naval Intelligence Division, and the people he met during his work, to provide plot elements. The character of Bond also reflected many of Fleming's personal tastes. Fleming wrote the draft in early 1952 at his Goldeneye estate in Jamaica while awaiting his marriage.