"VySaper Yakov" is a nonfiction study book written by Rabbi Yakov of Pshevorsk, focusing on religious and spiritual topics related to Judaism. Published in 2025 by Hotzaos Yerushalyim in the United States, this 1st edition hardcover book is intended for an adult audience and is written in Yiddish. With a size of 8 X 6 inches and 256 pages, this book delves into the complexities of Jewish teachings and beliefs, making it a valuable resource for those interested in exploring the depth of their spiritual traditions.