Oh, that book by 'An Ordinary Man'? I think you might mean the autobiography by Paul Rusesabagina, the hotel manager who sheltered people during the Rwandan genocide. The core of it isn't a fictional plot, it's his real, harrowing account of those 100 days in 1994. He details how he used his wits, negotiation skills, and the perceived neutrality of the Hotel des Mille Collines to protect over 1,200 Tutsi and moderate Hutu refugees from the Interahamwe militias.
It's a tense, day-by-day chronicle of bribery, bluffing, and constant phone calls to international contacts, all while surrounded by unspeakable violence. The 'plot' is his struggle to maintain this fragile sanctuary as supplies dwindle and pressure mounts. Reading it, you're just gripped by the sheer precariousness of the situation and his desperate, pragmatic heroism. It's one of those stories that stays with you because it really happened.