I've reviewed the first two in the series - Long Road to Mercy and also A Minute to Midnight.
Now third in line is Daylight, and yes, maybe Atlee is making headway in finding out if her twin sister survived a kidnapping as a little girl. The name of the kidnapper - Ito Vincenzo leads to New Jersey and a connection between the Vincenzo family and a scheme against democracy. Peeling back the layers of deceit, lies, and coverups, Atlee finally discovers the truth about what happened to Mercy. (cover blurb)
You will be shocked along with Atlee. Baldacci has quite the compelling heroine (or two!) and you ain't seen nothing yet. Onward to book four - the grand finale.
cover blurb - The final leg of her long road to Mercy will be the most treacherous. Mercy left at least one dead body behind at some point in her life. What else will Atlee find out? FBI, CIA, and other factions of government prove dangerous as Atlee sorts clues. Her mother, her real father, her other father - it's a convoluted tree of deception, alternate identities, and surprises.
This grand finale of the Atlee Pine series ratchets the tension higher and you'll keep the pages turning trying to keep up with Atlee. Whew! Quite the thriller.