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.
The James Bond series has many novels. 'Dr. No' is an important one. Also, 'From Russia with Love' and 'Goldfinger' are among the popular ones in the series. These novels not only tell exciting spy stories but also depict the character of James Bond in great detail, his charm, his skills and his adventures around the world.
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.
One of the well - known ones is 'Goldfinger'. It's famous for its thrilling plot and the iconic character of Auric Goldfinger. The graphic novel adaptation captures the essence of the original story quite well.
Since I don't have prior knowledge of a 'Jatt James Bond' in a full story, it could be a character from a contemporary piece of work that is trying to re - imagine the James Bond archetype in a different cultural context. It might have unique characteristics, a different backstory and a whole new set of adventures, but again, without more information, we can't really define who he is in the full story.