The Gatekeeper by James Byrne

Dez Limerick is a retired mercenary, previously known as The Gatekeeper - the man who opened doors that others wanted shut.

He's checking out sunny California when his hotel suddenly falls under attack. In the wrong place at the right time, Dez stops a meticulously planned scheme to kidnap Petra Alexandris, the daughter of a major military contractor.

While helping her uncover a secret plot buried within her father's company, Dez exposes a conspiracy that becomes more sinister at every explosive turn: a deadly operation involving media manipulation, militias, an armed coup, and an attempt to fracture the United States themselves.

There's only one obstacle between the conspirators and the downfall of a nation . . . The Gatekeeper.