" (אין אײנעם) is a Yiddish expression that means . Because your request mentions "Pdf," it most likely refers to the award-winning language textbook of the same name. In Eynem" The Textbook Released in 2020 by the Yiddish Book Center , In eynem: The New Yiddish Textbook is a 900-page, two-volume set designed for beginners. In eynem: The New Yiddish Textbook