My father who died in 2019 was in my dream. He showed me a book on astrology and there was something in particular he was pointing out. He was not into metaphysics at all when he was alive.
The appearance of your deceased father in your dream may represent your desire to reconnect with him or to feel his presence in your life. The book on astrology that he showed you may symbolize your interest in spiritual or metaphysical topics that you may have inherited from him. The fact that he was pointing out something specific in the book may suggest that there is some guidance or insight that he wants to share with you related to this topic. This dream may be encouraging you to explore these interests further and to trust your intuition as you do so.