Triple Throw books don't stack in the scroll bag, but some other books can stack.

Thanks boggart! You were right: when someone reads a Mastery Book or Skill Book, everyone on the map should see the success or failure glow, just like a scroll. That's live now. To re-test, read a book next to a friend and have them watch.

On stacking: in the original game skill and mastery books never stack, one book per slot. Your Triple Throw books are behaving the authentic way, and the ones that DO stack are the odd ones out. Mark is deciding how all books should behave so they're consistent.

Update on stacking: Mark decided every skill book and mastery book should stack, up to 9999 per slot. Your Triple Throw books (and all the other books that used to sit one per slot) now stack like the rest. To re-test: pick up or move two Triple Throw books and they'll land in the same slot.