Incarceron is a prison like no other; the prisoners live and die in their own dangerous world. All prisoners dream of an escape to an outside world that may not exist. That is, until prisoner Finn finds a device that gives him a connection to the outside world, and the possibility of escape. The outside world is a world trapped in time. Law requires all citizens to live strictly by the customs of a designated time period. This book had an excellent concept and dynamic characters, but was confusing at time.