Life As We Knew It by Susan Beth Pfeffer

Miranda’s had a normal life with friends and a stepfather while living with her mom and brothers. Until asteroids hit the moon and knocked it closer to Earth, which was the beginning to a series of disasters, as the moon is responsible for many of the Earth’s environmental conditions. Thunderstorms knocked out the electricity, floods killed millions of people on coastal areas. And that was just the beginning. Volcanos erupted under the increased gravitational pull from the moon. Ash blocked all traces of sunlight, causing plants to wither and die. Fortunately, Miranda’s mom always thinks of the worst that can happen, giving her family a better chance of surviving the new environment on Earth.

This amazing sci-fi book would keep you on edge until you flip the last page.