Bests & Worsts Reviews from Amazon

I chose this book as my free First Reads for May because the other selections were less appealing, but I didn't have great hopes for it. This was an ok, if totally implausible, story. I appreciate how the author wove some historical facts in with the fiction. However, the abrupt ending was completely unsatisfying and left more loose ends than it answered. It leaves the reader to ask "Is that it?" I'm afraid I ended up feeling sorry I wasted my time on this.