This book's idea is creative, the writing engaging, the adventures fast-paced, and the main characters seem like people you might like to know. On the other hand, some characters, like Kramer and his neo-Nazis, seem like comic book heroes, and there is more violence than necessary.
Many sci-fi time-traveling books deal with the idea that messing with time is a bad idea that usually makes things worse than they are. This book takes that one step further by creating an agency of time riders to make sure that does not happen.
In spite of all the high-tech talk about why things work and why they should be monitored, the story seems grounded in reality, and a complicated idea comes across clearly. Subheadings that give the time and place help the reader track the story threads, and intense moments sprinkled with philosophy and a bit of humor make this a very enjoyable and readable book. Most readers, especially sci-fi enthusiasts, will look forward to the other books in this series: Time Riders: Day of the Predators, Time Riders: The Doomsday Code, and Time Riders: The Eternal War. They may also enjoy the interactive missions offered on the Time Rider website.