You have heard variations of this before above, but I wanted to mention that "The Only Investment Guide You'll Ever Need" turned out to be sort of embarrassing for the guy who wrote it and then had to revise it a few times as life and the financial worlds evolved--it involved him having to make a lot of excuses in intros to each updated version, and I avoided it for years until I got it cheap and found that yeah, it was pretty decent despite the inflated title. I think that something that implies that it is for beginners and that you have your own approach to it would be of more interest to me as a bookbuyer than yet another title that is either 1) too-silly-to-me or 2) excessively registered-trademarked like the series written by "The Skinny B*itch" or The Idiot's or Complete Jerk's Guide to [something or other] in all their variations.
I would be most interested in a title that let me feel that yes, you may have a good sense of humour and fun with tarot, which implies that by reading your book I can have my own fun with it too. I wouldn't want something that just seems like "let me the author tell you all about me, me, me and my view in a way that gives the reader nothing more than a story but doesn't enhance skills". That came to mind since someone online recently promoted something she called "psychic boot camp" (trendy trendy title), and it turned out that she wanted people to give her $40 bucks for 3 hours of her telling you how not to get suckered by poor-quality psychics, but you don't learn anything about your own intuition or psychic abilities; my psychic self would fully expect it to be an in-person infomercial for herself as a psychic basically. To me, the title implied the complete opposite of what the text described it to be, and that made me grumpier and more against it than if it had a title which seemed more honest: "What To Look For In A Psychic Reader" or something.
I am wordy today! I hope this helps to give an idea of what one reader might find appealing or not. Good luck with it! Might sound silly, but why not flip a few cards and see what that brings to your mind...?