I have heard that there is a series of books which contain the history of the world of Final Fantasy from Final Fantasy I with an in-depth story line, through to beyond Final Fantasy XIII. The books are Japanese and contain the history of the world over a large period of time as the world evolves. There are links between the game story lines and its no co-incidence. They are all adapted from the same source. If someone can tell me the title of these books I will be extremely grateful.