Its a trilogy a true thinking person end of civilization series. It unlike most end of civilization series focuses on the government officials who is left behind trying to remake the US.
Most importantly its a mystery that asks three questions.
What is Daybreak. What is its purpose. Who are the followers.
Its riveting. The downside folks talk in paragraphs too many times. Also Directive 51 is a real directive. The series is Directive 51, Daybreak Zero and Last President. Its really one long novel divided in 3 books.