The Trials of Monty Perdi

His summons to appear before Congress made Monty Perdi weary. Accused of supporting terrorists and facing a mountain of damning evidence (and a few corrupt congressmen with their own underhanded agendas for destroying him,) Monty needed to act carefully or risk discovery. The grind from maintaining a false identity, a fabricated past, and the subtle wall he kept around his life had placed Monty in the very predicament he'd yearned to avoid--being in the media spotlight, in front of the world, and looking guilty.
And his inability to change it, only increased his fatigue.
Monty had no choice; he either appeared before Congress or went on the run, and neither offered him a viable option. His entire life depended on maintaining his false citizenship. Once that secret was out, it left him no where in the world to hide and threatened to harm his children as well.
With nowhere to run, but desperate and needing support, Monty enlists the help of the Wildermusses, the only people aware of Monty's secret. Monty is their friend and Wildermusses will not let him face this alone. So, with a plan in place, the entire family follow Monty to Washington, DC, hoping to help him.
But nothing goes as planned; his weariness--and the fact that he looks thoroughly guilty--force Monty to dramatically out himself to a stunned world. News that only encouraged every radical protestor, animal rights activist, and person with an agenda to gather on the National Mall. As hundreds of thousands of people amass, eager to either protest or encourage Monty in his quest for freedom, the clash of ideologies threaten to destroy the city with violence.
Violence soon expressed by the self-radicalized gunman, Olly Brown who wants to kill Monty, and the CIA who fear Monty and Bell's secrets might fall into enemy hands.
Attacked and injured, Monty and the Wildermusses find themselves on the run, pursued by the media, a CIA assassin, and of course, the persistent gunman, Olly Brown, whose reasons for seeing Monty dead even he can't sort out.
In their flight, Monty and his friends stumbled upon a most unlikely haven--a city kept secret for thousands of years. Known only to a few enlightened Mason, Monty and his friends enter a strange and wondrous world populated by people that seem almost human. (They seem rational and orderly.) But something lurks beneath the peaceful Infirian society; fearful citizens, inflexible leaders, and a tradition of causal murder. Closed and restricted, the Infirians leave the group with no chance of escape.
Monty and the Wildermusses had only days to get back to the capital to clear his name, and maybe stop the riots now threatening to destroy the entire country. However, to do that, they had to go through the CIA's assassin, Olly Brown, and the Infirians. All had different agendas, but one thing they did agree on--they wanted Monty and the Wildermusses dead.
Before this started, Monty felt sure he would make a laughingstock of his adopted country, but now it turns out that he just might change the world.