I love a good thriller and my list of best books wouldn’t be complete without including the amazing Douglas Preston. I chose this one, but I enjoy all of his books, including the Pendergast series (Relic, Reliquary, etc.) which he pens with co-author Lincoln Child. In Impact, Wyman Ford, a protagonist Preston has used before, returns to look into a mysterious source of gemstones. Instead, he uncovers something unexpected. As Ford investigates, a scientist discovers unusual gamma ray activity on Mars, and a waitress treks into islands off the coast of Maine to find a meteor strike thought to have gone down in the ocean. Eventually, all three plots are interwoven and lead to a stunning discovery that could decide the future of our planet.