There is no official book that is a direct adaptation of 'Pulp Fiction' with John Travolta in the way you might think like a novelization. But there are books on Quentin Tarantino's works in general which would include 'Pulp Fiction'. These books often explore the themes, the unique narrative structure, and the significance of actors like Travolta in his movies. They can be a great resource for understanding the movie better from a different perspective.
Yes, the movie 'Pulp Fiction' has inspired various books that analyze the film, its characters, and the cultural impact. However, there isn't a book that is directly the story in the same form as the movie but told only in a book version with John Travolta as the main focus in that sense.