So here is a list of the most frequently recommended tarot books I compiled after searching through about 10 pages of a Google search:
Number indicates how many times it was recommended.
11. Seventy-Eight Degrees of Wisdom by R. Pollack
10. Holistic Tarot by B. Wen
8. 21 Ways to Read a Tarot Card by M.K. Greer
7. Tarot for Yourself by M.K. Greer
Learning the Tarot by J. Bunning
6. Tarot 101 by K. Huggens