Intensity is the last installment of the Chronicles of Nick series. In this book, Nick's destiny is tested in ways he never thought could be possible. For one, he learns that he has a son in the future and that he's come to the past to ruin Nick's life and destroy him and the world. Then, he learns that his greatest enemies have somehow enslaved his future self and turned his friends against him. And worst of all, he learns that his mother's death is the catalyst for him losing his mind. At this point, Nick wants to give up. How can he fight against a son he has no knowledge of, enemies he can't see, or the fact that the most important person in his life is going to be gone sooner rather than later?
This book was different structurally than the rest of the books because it includes pictures of the characters and jumps between different points of view. At first, it's confusing to figure out how much time has passed from the events of the last book to what's happening in this book, but after a moment, the plot gets clearer and more interesting. This wasn't my favorite book in the series because there wasn't as much action and the end was very confusing and I felt, didn't fit with the theme. A lot of new characters were introduced, some of which were largely irrelevant and I felt were just added to try to make the plot more complex, but just made it more confusing.