"A Spark of Light" by Jodi Picoult
As usual for Picoult, "A Spark of Light" is controversial and timely, dealing with issues of abortion and gun control. One afternoon, a man opens fire at an abortion clinic in Mississippi, taking everyone inside hostage. Hugh, a police hostage negotiator, rushes to the scene, only to find out that his daughter is inside, texting him for help. The book progresses in reverse, going back hour by hour, telling multiple characters' stories to reveal how each of them ended up there in the first place.