The Camel Club, David Baldacci

The man known as Oliver Stone has no official past.  He spends most days as a protester camped outside the White House, his only goal to keep watch on Washington politics and expose corruption whenever he finds it.

But the stakes are raised when he and his friends, a group of conspiracy - theory misfits known as The Camel Club accidently witness the murder of an intelligence analyst.  Especially when the authorities seem happy to write it off as a suicide. 

For Secret Service agent Alex Ford, the suicide verdict doesn't ring true.  Nearing retirement and a comfortable pension, the last thing he should have done is stick his nose where it doesn't belong. As punishment he is reassigned to bodyguard duties, protecting the President during a visit to his home town.  But awaiting them is a terrorist cell that has spent months plotting an event that will shake the world. 

Meanwhile intelligence chief Carter Grey , arguably America's most powerful man since 9/11, is unnerved when he glimpses the face of an old acquaintance in Arlington Cemetery - but it is the face of a man supposedly long dead...

And as The Camel Club is poised to unveil a conspiracy that reaches into the heart of Washington's highly secretive corridors of power, Alex Ford's worst nightmare is about to happen...