@Trahzo

Isn’t that technically Spike’s poop that Rarity is holding in her magic?

Spike is so heroic and famous, that someone collecting and selling his poop

Isn’t that technically Spike’s poop that Rarity is holding in her magic?

@Background Pony #FF71
Maybe, but is funier to think that someone in Manehattan is trying to sell something that passed through Spike’s digestive system

1. She was looking at it for a minute or two before actually using it, and was herself for that part. Since Spike carried the book from the castle and nothing happened to his memory, I would say that in addition to her not remembering what she did under its influence, the book also caused her to forget or never put into memory the part where it was given to her.  
   2)It looks like it did when Spike found it, rather than how it did after Rarity changed it. I think it’s fair to call that “original state”.
    
   _{Out-of-universe, my guess would be animators getting careless with what “prop” objects (or whatever the appropriate term is) they used.}

It returned to its original state, good as new, after getting eaten by a dragon, and it wiped itself from the mind of its user so it wouldn’t be recognized.

1. Rarity was “not quite herself” during it, so it wasn’t ‘wiped’, it just never got stored in her memory.  
2. Was it returned to ‘it’s original state’? It’s not quite Jumanji kind of deal.
    
   ^{Personally, I’m leaning towards ‘just a similar decorative book’ In-Universe (or Mane6 fan-club merch), and ‘Writer tried to do continuity nod but failed miserably due to not even watching what he was nodding at’ out-of-universe.}