Batman Arkham Knight: The Official Novelization has been released in the United States region. If you are interested, you can purchase the book from Amazon via this page from the shopping website.
The official novel is published by Titan Books and written by Marv Wolfman, who has previous worked on Crisis on Infinite Earths, Epic Mickey 2, Superman Returns, The New Teen Titans, The Amazing Spider-Man and Tomb of Dracula.
The book covers the events that occurred in the recently-released videogame, which concludes the Batman Arkham trilogy that was developed by Rocksteady Studios. The studio is planning to move on to a completely new project. So, if you want to go more in depth in the story, you should take a look at the Batman Arkham Knight: The Official Novelization.
Arkham Knight was released on the 23rd of June on the PlayStation 4 and Xbox One consoles in addition to the PC platform. However, the computer version was broken at launch and sales have been suspended. A re-launch of the game for the PC won’t be coming out until later this fall as the development team is working to patch out all of the issues.
Even with all of the negative press, Batman Arkham Knight ended up getting high review scores.