Who is Cammie's Parents from Only the Good Spy Young and what is their importance?

Cammie's mother and father were/are both powerful and respected spies within the CIA. At the time of the narrative, Cammie's mother Rachel has been the headmistress of the Gallagher Academy, where Cammie goes to school, while Cammie's father has long been missing and presumed dead. Later in the narrative, however, Cammie is startled to hear it suggested that her father is still, perhaps, alive. Her determination to find out the truth defines the actions she seems, at the end of the novel, about to take in order to finally, thoroughly, claim freedom for both herself and her friends/allies/colleagues who seek to protect her.