The Crown of Fire, the final book in that terrific series The Copernicus Legacy by the unbelievably-talented Tony Abbott. I'm happy and satisfied after such a good read but I enjoyed it so much I wish there could have been more!
Where should I start? It would take way too long to summarize all that's happened in these books, so if you want a quick synopsis of the main plot line, click here for a review of an earlier book. This book wraps up the plot lines; we get to find all the Relics, see what happens when they are joined together (or when at least half of them are put together), learn what happens at CERN, what happens to Becca because of the poisoning, find out what all those nuclear warheads are for and finally discover the secret of Galina's past. Along the way there are characters who jump from building to building while bad guys shoot at them, look for the most powerful Relic in the Antarctic wilderness, have guns pointed at them by art-stealing Nazis, search in creepy flooded caverns under The Monster---and then there's the mind-bending and mind-blowing finale with all the paradoxes that time travel creates. In short, there's enough action and danger to leave any reader happy and satisfied.
There are some book series that grab hold of you so strongly that you spend every spare minute reading them. Then you remember them the rest of your lives. For me, they were the Percy Jackson and the Olympians books, (at least the first series) and then the Barnstormers/Sluggers series. Now The Copernicus Legacy joins that proud company. Go find them and read them!! Go find them and read them!! You will be richly rewarded when you do.
The Copernicus Archives series, which tie in with the four other books and get referenced in this one especially. They are every bit as exciting as the Legacy books.