pt. one is part one, as answered above. the novel was published in two parts in two volumes. I would suspect that p. which is the common abbreviation for page, and cm, which is the common abbreviation for centimeters would refer respectively to the number of pages in the book(s), and their size in centimeters (if you look at booksellers online, they will usually give the size of the books--in inches usually in non-metric countries and probably in centimeters in metric ones). That information is not supplied for these books.
Here's an example from my favorite online remainder bookseller. Notice the information they include on the book.
THE GREAT GARDENS OF CHINA: History, Concepts, Techniques .
By Fang Xiaofeng
Beginning with an introduction to Chinese beliefs and the historical development of garden design, this volume discusses the basic aesthetics and landscaping elements (architecture, rock stacking, waterscapes, plants, borders, and scenic routes) used in Chinese garden design. The author also describes specific gardens, from famed world cultural heritage sites like the Summer Palace in Beijing and the gardens of Suzhou, to the lesser known.
265 color photos.
Published by Monacelli
Size(inches) 9 x 12
Item # 2469871
Current Pub at $60.00 Your Price $39.95