Moonfall, by Jack McDevittRead about the other entries on the list.
McDevitt is one of the authors whose work often falls just outside the mundane sci-fi sphere—his stories are usually just a bit too fictional or fanciful to be truly mundane. But Moonfall is as close to it as he’s ever come—and it’s pretty close. In a future where a small lunar base has been established, a huge, fast-moving comet is discovered—and calculated to impact the moon in just a few days. When that happens, the moon will be vaporized, and destruction and fire will rain down on the Earth. Desperate measures are launched to evacuate the base and somehow avoid an extinction-level event, and McDevitt keeps a steady hand on the reins of plausibility the whole time, resulting in a story that trucks in realism, and shares a spirit of can-do science with First Man; it seems humanity can achieve anything if we can just find the right engineers.
--Marshal Zeringue