On November 13, 2015, Antoine Leiris’s wife, Hélène Muyal-Leiris, was killed by terrorists while attending a rock concert at the Bataclan Theater in Paris, in the deadliest attack on France since World War II. Three days later, Leiris wrote an open letter addressed directly to his wife’s killers, which he posted on Facebook. He refused to be cowed or to let his seventeen-month-old son’s life be defined by Hélène’s murder. He refused to let the killers have their way: “For as long as he lives, this little boy will insult you with his happiness and freedom.” Instantly, that short Facebook post caught fire, and was reported on by newspapers and television stations all over the world. In his determination to honor the memory of his wife, he became an international hero to everyone searching desperately for a way to deal with the horror of the Paris attacks and the grim shadow cast today by the threat of terrorism.

Now Leiris tells the full story of his grief and struggle. You Will Not Have My Hate is a remarkable, heartbreaking, and, indeed, beautiful memoir of how he and his baby son, Melvil, endured in the days and weeks after Hélène’s murder. With absolute emotional courage and openness, he somehow finds a way to answer that impossible question: how can I go on? He visits Hélène’s body at the morgue, has to tell Melvil that Mommy will not be coming home, and buries the woman he had planned to spend the rest of his life with.

Leiris’s grief is terrible, but his love for his family is indomitable. This is the rare and unforgettable testimony of a survivor, and a universal message of hope and resilience. Leiris confronts an incomprehensible pain with a humbling generosity and grandeur of spirit. He is a guiding star for us all in these perilous times. His message—hate will be vanquished by love—is eternal.