A Look at Monster Book

Sorry for Necro Posting here (if i am at all) but i just wanted to mention - as it wasn't explained in your guide thing - is that every time you get a new card, the picture for the monster will change. It will include moving, usually an attack, it getting hit, and it dying all in one animation.

Also, in regards to this:

• There's a pretty cool effect that appears over your head each time you loot a card. Everyone nearby will know when you get one :p
  

Other people cannot see the effect on your head. I just saw someone pick up a card a second ago and I saw no effect.

if it's in KMS, then it's because they already had 5 cards, if it was GMS that's a glitch, but I know I've seen people pick up cards and have that effect.