The level of interest in (number of questions about)appears to be increasing…. There is a Quora topic for .
Generally speaking, automated books are created from templates; however, “poetry generation systems” tend to be more random, like scrambled nonsense generated by “Markov systems” (aka “Markov generators”). At one time there was a fad of creating “poetry” by translating something into one language and then translating it back using Google Translate, which changed the words/meaning going each way.
Currently, the two main companies with products in the NLG space areand , focused on creating narrative from raw data. An interesting factoid is that , principal investigator of IBM Watson, started his career working on “storytelling machines” (aka “automated storytelling”, “story generation” or “story generator”).
See also my Quora answers to: