HEBREW AND GERMAN in parallel columns. RARE polemical work by an eminent Karaite scholar and polemical writer Isaac ben Abraham of Troki (1533-1594), with German translation and a revised Hebrew text by Rabbi David Deutsch. 205x150mm. X+432 pages. Half-cloth marbled board rebound Hardcover. Cover wrinkled and rubbed. Cover edges/ and spine edges bumped and worn/peeling. Spine detached from front cover. Spine hinges and edges tattered. Title sticker residues on spine. Binding slightly creased and coming loose. Stamp on front endpaper. Inner cover slightly dirty. Whitepages and several extreme pages dirty/slightly stained - NO damage to text. Title page edges partly taped - NO damage to text. Title page fore edge slightly chipped - NO damage to text. Page 1/2 slightly torn near binding - NO damage to text. Tape between pages X and 1. Binding slightly loose and visible between pages 2-3, 26-27, 30-31, 414-415. Pages browning. [SUMMARY]: This extremely rare 16th-century Jewish polemical treatise has sustained some damage (mostly external), but is still in good condition condition.