The Taking - Dean Koontz
On the morning that will mark the end of the world they have known, Molly and Niel Sloan awaken to the drumbeat of rain on their roof. It has haunted their sleep, invaded their dreams, and now they rise to find a luminous silvery downpour drenching their small California mountain town. A strange scent hangs faintly in the air, and the young couple cannot shake the sense of something wrong.
As hours pass and the rain continues to fall, Molly and Niel listen to disturbing news of extreme weather phenomena across the globe. Before evening, their little town loses television and radio reception. Then telephone and the Internet are gone. With the ceaseless rain now comes an obscuring fog that transforms the once-friendly village into a ghostly labyrinth. By nightfall the Sloans have gathered with some of their neighbors to deal with community damage... but also because they feel the need to band together against some unknown threat, some enemy they cannot identify or even imagine.
In the night, strange noises arise, and at a distance, in the rain and the mist, mysterious lights are seen drifting among the trees. The rain diminishes with the dawn, but a moody gray-purple twilight prevails. Soon Molly, Niel, and their small band of friends will be forced to draw on reserves of strength, courage, and humanity they never knew they had. For within the misty gloom they will encounter something that reveals in a terrifying instant what is happening to their world - something that is hunting them with ruthless efficiency.