Preserve It Naturally: A Complete Guide to Food Dehydration by Robert Scharff & Associates $6.00 Condition: Very Good. Used books may not include companion materials, and may have some shelf wear or limited writing. shop › Preserve It Naturally: A Complete Guide to Food Dehydration by Robert Scharff & Associates Add To Cart Added! Condition: Very Good. Used books may not include companion materials, and may have some shelf wear or limited writing.