Currently, AI can generate text that is coherent and reasonably well-written, but it is not yet capable of writing a book that is comparable in quality to one written by a human. GPT-3, the most advanced AI language model available to the public, can generate text that is relatively coherent and well-written, but it is still limited in its ability to create truly original and engaging stories.

It is difficult to predict exactly when an AI will be able to write a book that is comparable in quality to one written by a human. The development of AI and its capabilities is a rapidly evolving field, and it will likely depend on advances in natural language processing, machine learning, and other related technologies.

It's also important to note that while AI can generate text that is coherent and relatively well-written, it still lacks creativity and originality that are essential elements of a good book. It is unlikely that an AI will be able to write a truly great book without human-like creativity and understanding of human emotions.

And what else can I tell you honestly, with the utmost sincerity!!! Don't use articles written by AI... no matter how good the program is. Google prints you and penalizes you. And if you use them, use them only as ideas, nothing more. Professional advice. Google is smart as hell.