Is This The Rarest Blindbag Pony? Interesting collector guide book & photos

Recently, I discovered this Blind Bag Ponies Only guide book.
It's at Marshalls for 4 dollars! It's also all over ebay for about 6 and probably free shipping too, if you'd like to get it. I had never seen or heard of it before just picking it up in the store. As you can see, it comes with a blindbag pony who's symbol is a pink teacup with some steam and 1 sort of dot thing on one edge.

Whoever did the book was clearly a fan of some kind, as it has photos of front/back of each card, the blurb about the pony, and descriptors for everything. Interestingly, sometimes the ponies have quotes or comments they make in speech bubbles too. (That is a cute touch) It does include the euro only releases, and seems to be (to my knowledge) actually completely-complete, including things I didn't know about like some retailer exclusive packs and etc.

What does it not do?
Catalog its own pony! I described it because there is no name for her in the book that I could find. It seems odd that is so thorough but then neglects itself. Do you suppose that it's the author's OC? Like as part of the book deal, they'd get their own special OOAK Blindbag to go with the book?

Do you suppose this is the rarest BB figure because of its very late release and that you had to buy a book with 19.99 suggested retail price to get it? Do you think a different character is rare-er? (If so, who?)

But, since I didn't see any posting about it, hopefully now everyone who would want the book can get it at a reasonable rate.

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Everybody I know calls her Tea Love