Is there a cap on the class mystery mastery books you can buy from the tempest shop?

Because I plan on buying tons of Angelic Buster mystery books when they get added, not sure if I start splitting my coin farming between characters or not. (so I can buy up to the cap on one character, buy up to the cap on another, etc)

And while I'm here, I heard you could buy as many special books as you wanted, is that true?