The theme of the book Codename Zero by Chris Rylander is don’t hide the truth. Since Carson hid the truth about getting the package and turning on the device making it self destruct in a certain amount of time he was under a lot of pressure keeping the device. If he told somebody then he would’ve gotten help sooner and he would’ve and more time to figure things out. This would help because they have more time to get help about the device. Later in the book, Carson told a couple teachers and he was able to get about it. If he didn’t get help then he would’ve had the device the whole time and it would’ve exploded. In conclusion the theme of the book Codename Zero by Chris Rylander is don’t hide the truth.