I have been experimenting to develop custom GPT using various ebooks I have on psychology and business, for my own private purposes.
I upload the epub files converted to docx format to create those gpts. But eventually I realize that chatgpt does not go thoroughly with each and every docx file properly.
In order to get more control, I asked chatgpt to summarize chapterwise a 224 page long book containing 15 chapters, but it failed to do that.
What is the best way to create custom GPT using soft copies of ebooks?