If you enjoyed the action in Silverwing you will not be able to put this one down. It picks up right where book one left off and is all action from the get-go. The whole story line gets a litte more crazy and hard to believe in this book and I didn't feel like I learned as much about bats (maybe because I had already read the first one) but I loved the book and stayed up late to get it finished.BTW, I am not afraid to admit that I am an adult, and not a "young-adult" anymore, both of these books are great and I recommend them to my adult friends as well as students. :)