Probably 'Casino Royale'. It was the first Bond novel and really set the tone for the series. It introduced Bond's character, his gambling skills, and his way of dealing with enemies.
'From Russia, with Love' is also a classic James Bond novel. It has an intricate plot involving a Russian beauty and a dangerous conspiracy. The novel is renowned for its detailed descriptions of espionage and the complex relationship between Bond and his enemies.
Yes, 'Casino Royale' is a must - read. It sets the tone for all the Bond stories that follow. You get to know Bond's character, his skills, and his way of dealing with the world of espionage right from the start.
I think 'Goldfinger' is among the most popular. It has that iconic villain and the exciting story of trying to stop his evil plan. Also, 'From Russia, with Love' is very popular as it has a great blend of espionage, action and a touch of romance.
James Bond is purely fictional. He exists in the realm of imagination, crafted by authors and filmmakers to entertain us with thrilling spy tales and escapades.