The book life as we knew was an amazing book. The author, Susan Beth Pfeffer, really made this book realistic. It started out when an asteroid made an impact on the moon. Many people thought this was a time to celebrate but when they saw that the moon came closer they were scared. It changed life for everyone. For Miranda, the main character, her family, and the humans on the earth. Survival was then based on how much you prepared for it with food that would last for more than a year and that included water.