I just managed to write a 433-page book using the most powerful AI model in the world. For now, this is an internal BookNova experiment, but very soon there will be an option to choose higher-quality texts (which will use a little more credits per word). The problem with this AI model is that it is very slow.It is very high-quality, but that's exactly why it's ALSO VERY SLOW. One book takes 30-60 minutes to write. :D But the quality is amazing!