A Murderer Among Us — Marilyn Levinson

Lydia Krause moves to a Long Island retirement community, where she uncovers a resident's criminal past. She exchanges heated words with his wife, who's found dead the following morning, mowed down by Lydia's Lexus. Now Suspect Number One, Lydia investigates. Amid threats and more deaths, Lydia forges new friendships, helps resolve her grown daughters' problems, and finds romance.