One of the first books I read on my journey was "One Truth, One Law: I Am, I Create" by Erin Werley. It was a completely new concept for me, so it was a good beginner book. I have linked the free YouTube audio book below in case anyone is interested (I am not affiliated with this book nor author at all).
https://youtu.be/uz7qNWbQujk?si=oDTWc2p-1g5Oy6wN