The book does not replace communication with a Kabbalist-teacher. You can read many books that can direct a person to the right goal, but you can achieve it only by learning from the right teacher.
Moreover, not all Kabbalists, those who have attained the highest state of nature, can be teachers. It depends on the root of the soul. Someone has it, someone does not. As in our world: a person can be a great scientist, but a terrible teacher, i.e., he is not given these abilities. But there are, on the other hand, those who teach extremely well, but they themselves are small fries.
Question: So, the connection with the upper world takes place through two components: a teacher and a book?
Answer: Yes. Therefore, this science is called “Kabbalah,” that is, “receiving,” including from the teacher.
From KabTV’s “Fundamentals of Kabbalah,” 6/10/19