I am an engineer in the education field and today I bought Tier 4, because at my university we need to create lots of publications, I see that this not only provides a great result in creating books in a few minutes. I must say that this is not ChatGPT - it is something authentic and incredible. The only thing you should take into consideration is to provide other languages, I'm Ecuadorian, so spanish would be great fit as a second language. At the same time, I see that in terms of code, it doesnt generate an image or coding, but it could be soemthing you could update. That would be a great help. I like also that you can download your word document and refine according to your experience or maybe adding an image that relates to the content. I really like it. Hope you can consider my suggestions and I see lots of potential to this tool. I tell you this, beacuse I payed to a person to create a book and it has passed more than year and a half and the book is not published yet. So thank you so much, but please keep improving with the recommendations of the users.
Another detail to consider is to enable the citations in APA, IEEE, Vancouver formats because that will give sustain or relations to authors that have given maybe the same idea and the book provides this type of references at the end. It should be a great improvement.