Since you are looking for a PDF format, these classic, public-domain texts are the foundation for modern symbol interpretation: The Pictorial Key to the Tarot by A.E. Waite:
The hidden symbols are the alphabet of the soul. When you learn to read the symbols, you no longer need a guidebook. You can look at any card and construct the meaning yourself based on what you see. tarot cards the hidden symbols explained pdf
Subtle details that change the meaning
