This book details over ten thousand descendants of Johann Peter Klinger and Catharina Steinbruch - most of them from the Pennsylvania Dutch region - including most of the prominent families of the historic Mahantango Valley. The origins of Klinger's Church and Klingerstown are discussed as well as numerous photos of historic homes and gravesites. This book is a "must have" for anyone interested in Mahantango/Lykens Valley history or genealogy.