The Jewish Dietary Laws: Volume Two: Dietary Laws Regarding plants and vegetables with paticular reference to produce of the Holy Land / The Jewish Dietary Laws IS A SET OF BOOKS explaining THE LAWS OF KASHRUTH , KOSHER .... Kashrut is the body of Jewish law dealing with what foods can and cannot be eaten and how those foods must be prepared. The word "Kashrut" comes from the Hebrew meaning fit, proper or correct. The word "kosher," which describes food that meets the standards of kashrut, is also often used to describe ritual objects that are made in accordance with Jewish law and are fit for ritual use. Food that is not kosher is referred to as treif (literally torn). Kosher is not a style of cooking and therefore there is no such thing as "kosher-style" food. Any kind of food - Chinese, Mexican, Indian, etc. - can be kosher if it is prepared in accordance with Jewish law. At the same time, traditional Jewish foods like knishes, bagels, blintzes and matzah ball soup can all be treif if not prepared in accordance with Jewish law.
