The Zero Hour, book 3 in the Secret History series reunites us with Simon, Jack, Tanya, Hannah and the rest as they prepare for a final showdown with The Zealot. The Listeners are now no longer open about their listening after they were declared a terrorist organization, making them far harder to spot. There are so many excellent aspects to The Zero Hour, but the well reasoned discussion about time travel will really get you thinking. This is a more than worthy finale to a more than worthy series! Overall, 5/5 stars, highly recommended for fans of sci-fi thrillers, hard science fiction and thrillers in general! I can't emphasize enough just how much I loved this book and series!