This was a very interesting book. It combines history, espionage, science, paranormal and a little romance. The writing flowed and the characters were done very well. I rooted for Pierce from the very beginning. This book will have you guessing all the way through. There are lots of "who dun its" to figure out. Some great action as well! I wouldn't say it ended on a cliff hanger, per se, but it has an "open" ending. I look forward to reading more about this Phenom League!