Menahem Nahum of Chernobyl (1730–1797) was rabbi of Chernobyl, near Kiev, in Ukraine. He was part of the Hasidic movement that played a key role in the history of eastern European Jewry. Upright Practices is a devotional manual of personal practices. The Light of the Eyes is a collection of homilies based on the Book of Genesis.
For a massive collection including over a hundred and twenty of the volumes in this series, see the Classics of Western Spirituality Bundle (126 vols.).