Dennis Showalter, professor of history, will sign copies of his new book, “Hitler’s Panzers: The Lightning Attacks that Revolutionized Warfare,” at 2 p.m. on Saturday, Dec. 19 at Barnes & Noble Booksellers next to The Citadel mall. Showalter, a World War II scholar, presents a comprehensive study of Nazi Germany’s armored forces and their influence on the role of the army in the Third Reich. Panzers, self-contained armored units able to operate independently, became the nucleus of the German army’s fighting power as well as its moral focus and the core of its identity, establishing an entirely new military doctrine. Showalter is a visiting professor and guest lecturer at West Point, and former president of the Society for Military History. Click here for details on the signing and the book.