There are 4 books in the Survival Rules Series series. The newest book is Rules of Engagement which came out in 2019.

1
Rules of Survival

Book cover of Rules of Survival
He hated the rules until the power grid failed.Tyler Ford is a tour guide, a brother, and the son of a prepper from Whitefish, Montana. Robbed of a childhood and forced to learn his father’s stringent rules of survival for every kind of apocalypse, he couldn’t wait to leave home,…
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3
Rules of Darkness

Book cover of Rules of Darkness
They learned the rules, then broke them to survive.One month after a crippling attack on the power grid, the country is still in darkness. As a new wave of violence sweeps the nation, the Ford family are soon drawn into a battle for survival with an unknown menace. Tasked with…

4
Rules of Engagement

Book cover of Rules of Engagement
Rules kept them alive, but a single choice could destroy them.After discovering the identity of the mysterious Morning Star, and dividing Camp Olney, the Ford family prepare for an imminent attack from Jude Lawson. However, the real threat might not come from raiders but a powerful and ruthless group intent…