Firstly. this list is based on the books that helped put things in a better perspective for me. Secondly, these foundational books are helpful references and resources that will evolve with your level of understanding.
So check out these books if you haven't done so already and let me know what you think.
This book is in list format. It helps you gain quick access to the Significators of signs, planets, and houses.
The Essentials Of Vedic Astrology by Komilla Sutton
I find Komilla's books to be informative and structured in a way that the reader is not necessarily overwhelmed by the vast content. She provides a structured foundation that helps understand how to read your natal and how the energies communicate.
The Rahu Ketu Experience by Prash Trivedi
The Nodes Rahu Ketu are the two motivating forces behind our actions in more ways than we give them credit for. If we can try to grasp their strengths and blindspots we have a better chance at being successful in neutralizing their effects. At the very least we can get better at accepting that they are active in the background due to our actions in previous births.
Let me know which astrology book is your go-to reference book in the comments.