Does the special mystery mastery book is glitched?

ikr i was going to buy one for finale ribbon and soul resonannce and hopefully grind coins for trinity but nope and you can buy more special books? or you can only buy another one after use because knowing nexon the event will end the shop gone and no books for free.

Yeah, it's not limited this time around, like Renegades was, and you can hold on to more than one at a time.