Best books to study tarot?

Denever

This is my favorite beginners book. I have it in hard copy, too, both to support her and because it's easier to use it for reference in that form. The course is called Learning the Tarot, but the site URL is actually learntarot.com

The book of Joan Bunning is a great starter too : Learning the tarot.

You can check all of the content online on her website (learningthetarot.com) but I personally prefer to have a hardcopy (and support the author for her work).
 

Edward Tarot Hands

But Rachel Pollack's 78 Degrees of Wisdom is THE classic about RWS card meanings, and no tarot library is complete without it.

I would go with that but
your Tarot is it's own book so why don't you try seeing what 'definitions' come to you while meditating on the card as well.