The Last Good Day — Peter Blauner

THE PAST IS A DANGEROUS NEIGHBORHOOD

Lynn Schulman returns to suburban Riverside, New York, with her family, believing you really can go home again. But that's before a headless body floats down the Hudson River and the victim is identified as someone important to Lynn. Before the detective on the case turns out to be Lynn's ex-boyfriend, who's obsessed with destroying her marriage. And before the murder turns this wealthy community into a terrifying battleground. Here in the place where she had always felt safe, Lynn is caught in a primal fight-to protect her family and save her own life...