An Invisible Woman — Anne Strieber

Kealy Ryerson has everything a New York socialite could want: wealth, power, a devoted husband and loving children. Then her husband, a high-profile defense attorney, calls while she's at the salon.

Run, he says. Take the children. Go now. Trust no one.

But Kealy waits too long--within a half hour, her husband is dead, shot down in the street, and now she cannot run: her apartment is under surveillance, and she can't get to her passport or any money. Her credit cards have been cancelled. She and her teenage kids are alone on the streets, with only their wits to keep them alive. But without her fancy clothes and expensive makeup, no one recognizes Kealy--not her husband's partner, not her best friends.

Kealy is a poor woman of a certain age, who can walk invisible among the people who want her dead.