I have 7 figurines and went to the antiquarian yesterday getting the message to come back later when he was done reading the book. Other mates of mine have also done so.
About 24 hours later he still hasn't got the quest for the last figuring for me...my quest log still says wait for him to read the book. My clan mates who have visited him had no such delay. Is it a random thing, or am I just the lucky one?