Spivak, Aaron. Cheker Halacha [halachic novellae]

One of the first halachic works printed in America. The author had served as a Rabbi in Omsk, Siberia before immigrating to New York. He was unable to secure a pulpit in America and published this book to sustain himself. In his approbation, Rabbi Jacob Joseph of New York beseeches the public to provide the author with a professional position in order to stabilize his economic distress