Elizabeth Briggs has written one fun page-turner. Elena's a great narrator, flawed yet personable; Adam, Chris, Trent, and Zoe, the other four teens who travel into the future with her, are good secondary characters with their own unique abilities. I liked them all. This YA novel is a very compelling read--from the first page to the last I couldn't put it down. Especially when Elena & Co. step 30 years into the future instead of 10 and things start to go wrong; then they begin to uncover the first of Aether's lies and the guessing game of who's telling the truth and who they can trust begins. As with any time travel novel, a little suspension of belief is required. But all in all, this turned out to be a very fun and entertaining read.