Whether you are relatively new to the idea of ‘keeping kosher’ or already quite knowledgeable of the issues, this book is for you. I recommend this book as a beginning place for understanding how rooted in Scripture kashrut is, and its importance for those at the beginning of their journeys.
Not only does the Bible instruct concerning livestock, but it also contains instructions about plants as well. One of the most often discussed topics is the mixing of seeds. 
A rabbi was walking down the street when he saw Benny, a member of his synagogue, entering a non-kosher restaurant. Puzzled, he went closer to the restaurant and peeked in the window. "Perhaps he's just going in to ask for directions or use the toilet," the rabbi thought. But sure enough, he watched as Benny was escorted to a table. 