Nantucket Nights / Elin Hilderbrand 345 p.

Friends for 20 years, Kayla, Antoinette, and Val have had their special swim night on an isolated Nantucket beach.  They have their issues, Kayla in trusting her husband; Antoinette who gave up her infant daughter when she discovered her husband's infidelities; and, Val longs for a bigger life.  They thought they knew each other.  After all they shared their deepest secrets on that beach.  When Antoinette ends up missing and presumed dead, possibly a murder victim, Kayla sees a side of her friends that rocks her world.  This is chiefly a story of Kayla and how she is affected by the darker side of her friends.