An official novelization of the game, titled "God of War II", was announced in July 2009, along with a novelization of the original "God of War". It was written by Robert E. Vardeman and published on February 12, 2013 by Del Rey Books in North America, and on February 19, 2013 in Europe by Titan Books. It is available in paperback, Kindle, and audio formats. The novel recounts the events of the game and adds even more layers than what the first book did in relation to the first game. The Sisters of Fate are given more story instead of only being the next to last boss fight of the game. They are introduced in Chapter 2 and have several chapters dedicated to what they were doing throughout Kratos' journey. For example, they allowed the Titans to come back due to their boredom and Lahkesis in particular liked to toy with Kratos. Due to how much the Sisters dabbled with Kratos' fate, it allowed him to make it as far as he did and also allowed him to act on his own will due to the many alterations to his life thread.