I feel that the release of Book 15 is the most anticipated update because it will contain new storyline quests. There have not been new storyline quests for some time (April 2013 I think, correct me if I'm wrong) and some pirates who have finished the storyline quests must be getting bored. I even remember someone who did every quest (including side quests and promotion quests) promoted all her/his companions, trained his pet and still got bored. I think Book 15, 16, 17 and maybe 18 should be released together due to the long wait. That's just my opinion though. I cant wait to see what you guys think is the most anticipated update!