Despite kilt-wearing characters right out of Brigadoon, Picoult (Picture Perfect, 1995, etc.) persuasively explores a mercy killing in a small Massachusetts town and the subject of spouses who love too much. Wheelock has been home to the tradition-upholding MacDonalds and their hereditary chieftains since the 18th century, when the clan fled Scotland after the British defeated them in battle. Each clan chief has inherited more responsibilities over time, and the current laird Cam MacDonald is, like his father before him, the local chief of police. Cam yearns to travel and, though married, finds wife Allie's devotion stifling. Allie, a florist, has in turn suppressed all of her own opinions and pleasures for the sake of making Cam, whom she adores, happy. As the story begins, another MacDonald, James, has demonstrated his overwhelming love for wife Maggie in a very extreme form: James turns himself in to cousin Cam after admitting that he has smothered Maggie at her request because she was terminally ill with cancer and could no longer stand the pain. While the quality and wisdom of James's devotion to his wife will be tried in public, Allie's love for Cam will also be tested as free spirit Mia arrives in town. Mia has been everywhere and seen all the places Cam dreams of; she is also a whiz with flowers and gets immediately hired by Allie. While AIlie helps James's lawyer find witnesses who will attest to his devotion to Maggie (he's now being tried for murder), Cam and Mia have an affair. A heartsick Allie learns of it, throws Cam out, sells all of his belongings, and then tries to forget him. But true love is resilient, and Allie, like James, having learned the price of being ""the one who loves more,"" will now try for greater balance. Overly predictable characters aside, Picoult does manage this time to bring trendy, headline-grabbing themes to life.