I think there amazing. As soon as I finnished the 1st book they were my new favs. Even though I hadn't read the 秒 one, (the 3rd wasnt out yet) best 图书 eva!!!
the are absoloutly the best and favourite series I've ever read in my whole life. Finished all the 4 books, and Clockwork 天使 由 Cassie too. Can't wait for the 下一个 ones. They're just that much addicting.