Water is the one resource you cannot live without. "A Prepper's Guide to Rainwater Harvesting" can help you design a rainwater system that will ensure clean, pure drinking water for both beginners and experts alike. Start with a rain barrel and expand to a 5000-gallon underground cistern. Learn to filter, purify and store water for emergencies or for everyday consumption. If you can't afford to drill a well, plan on harvesting rainwater for all your needs. This valuable source of information is great for anyone who wants to live off the grid.