Here's the title page from an interesting, I'm sure, book from 1899. As you can see, the author Aaron H. Frankel was a vegetarian. This is the Yiddish translation of the book, which in English was called "Thou Shalt Not Kill" and subtitled "The Thorah of Vegetarianism," the author includes newspaper blurbs about one of his other books. One of them, from the Boston Globe, reads "It is a bright, breezy story. The author has improved the opportunity to say a good word for his favorite dogma — vegetarianism."