Shadowfever - Finished

I finished Shadowfever late last night.  It is definitely her best book yet.  There were so many plot twists in this book, I didn't know whether to laugh or cry from one minute to the next.  I know that this is the last book in this series, and it did wrap most things up very nicely, but I'm guessing that her next series will pick up where this one left off - just with different characters from the Fever series.  I've already picked the characters that I believe will be in the next book.  What do you think?