Simple Genius by David Baldacci
In a world of secrets, human genius is power.
And sometimes it is simply deadly . . .
Near Washington, D.C., there are two clandestine institutions: the world’s most unusual laboratory and a secret CIA training camp. Drawn to these sites by a murder, ex-Secret Service agent Sean King encounters a dark world of mathematicians, codes, and spies. His search for answers soon leads him to more shocking violence and an autistic girl with an extraordinary genius.
Now, only by working with his embattled partner, Michelle Maxwell, can he catch a killer . . . and solve a stunning mystery that threatens the entire nation.