Allen's Authentication of Later Chinese Porcelain (1796 AD - 1999 AD)

Chinese porcelain has a long history covering thousands of years. So when I saw the title which included the word "later" I thought of Qing dynasty and perhaps, Ming dynasty, but no, the focus of this book is on the 19th century. The 19th century Chinese porcelain is described by most scholars as a time of modest to poor quality. This book does not really address this issue. I was hoping for a book that addressed how to identify Qianlong, Kangxi and other similar periods.