So, a big part of why I picked up this book was that the Boston Underworld books had non-cliffhanger endings. I liked that I was getting a whole book. (Speaking of which, you should buy the Boston Underworld books. They're good!) 
 In this case, I didn't get a whole book. 
 That said, some problems aside, the book kept me reading right up to the end. Very engaging. Still, I won't be buying book 2.