For syntopical reading, a reader should approach books with intent and selfishness from the start anyway. With AI tools such as NotebookLM that is only trained on materials the user provides, the reader has a new way of engaging and interacting with books. Read the top 6 books on a subject, highlighting, asking questions, continuing deeper research and you're likely in the top 10% experts on that subject globally. Find gaps in the materials and reach out to the authors for more, you're approaching the top 5%. But now with AI, you have this whole new level where you can interact with the materials directly and it engages with you back. For active readers this is going to be a profound change. For authors, think of your books as not only educating the readers but training their AI tools as well.