Some release details have been listed by Amazon for the upcoming Batman: Arkham Knight Signature Series Guide. Brady Games will be publishing the upcoming book, which has an ISBN-10 of 0744016169 and ISBN-13 of 978-0744016161. You can preorder the official strategy guide right now via this link from the retailer’s website. Check out the cover design (which is currently mentioned as not the final version) below. 
The above-mentioned Brady Games previously teamed up with Warner Bros. Interactive Entertainment to create the guides for Batman: Arkham Asylum, Batman: Arkham City and Batman: Arkham Origins. In total, the one for Arkham Knight has 320 pages.
Unfortunately, the listing did not provide any details as to what the book will include. It will most likely contain a complete walkthrough with detailed maps that highlights all the collectibles and hotspots in Gotham City.
The Batman: Arkham Knight Signature Series Guide will be made available on the 2nd of June, which is conveniently on the same release date as the videogame. The sequel, which will be the last in the saga, adds several new abilities for Batman, including being able to drive around and fight enemies with the Batmobile. Because of the addition of the powerful vehicle, the game won’t be coming to last-gen consoles due to technical limitations. Instead, it is only coming to the PlayStation 4, Xbox One and PC.