which one is better to buy the ticket? From the 'kid scient ' book or Tom Lee? It is because it need longer to to buy the book & sent the form than go to Tom Lee on 8/1? Is it already save the seat for the book buyer or not? May be I can not take the better one seat or can not buy it by sent the form.Is it more safety if go to the Tom Lee? And how much for the diff A,B,C area?