Cara Black is one of my favorite mystery writers, along with Donna Leon. Her detective, the incomperable Aimee Leduc, computer whizz, athlete, second hand fashionista, and now, mom, literally climbs tall buildings, not in a single bound, but in high heels. In one book, she actually climbed up the side of a building while temporarily blind.
If you are new to Black and Aimee, I recommend starting with book 1. Murder in the Marais. Otherwise, you won't know who these people are, and why they feel the way they do about each other. Black's books advance through the Paris arrondisments in order. The Marais is in the first, etc.
Having said all that, in Murder in Bel-Air, Aimee is about to give the keynote speech at a prestigious computer conference when, suddenly she gets the call dreaded by parents everywhere. Her nine month old daughter, Chloe, has been abandoned at her playgroup. Aimee's mother, Sydney, was supposed to stay with her, but has unaccountably disappeared. Aimee babbles apologies and jumps into a taxi to cross Paris to retrieve Chloe.
She sits down in a neighboring cafe to check her schedule and take stock. The waiter asks Aimee where her mother is, and mentions that Sydney came in every day to talk with a friend. Friend? Aimee's detective alarms go off. Who is this friend? In the waiter's opinion, the friend is a homeless woman who stays at a nearby shelter run by nuns. Is her mother a volunteer at the shelter? God only knows. Aimee doesn't.
I am not giving anything away about the plot by pointing out that Sydney LeDuc is a former terrorist (or on the terrorist most wanted list) who left Aimee when she was eight years old. This information is in a letter to the reader Black inserted in the beginning of the book.
As she leaves the cafe, she passes a groups of neighbors discussing a murder that just took place. Aimee fears that the dead woman might be her mother, so she goes to the shelter to find out. Thus begins a complicated tangle of African liberation, the French equivalent of the CIA, car and foot chases through various neighborhoods in Paris, computer hacking, and mysterious documents. Also the problems of a busy single mother who needs regular child care.
This is a great book, but don't read it first. You'll thank me if you read the other 18 books first.