The previous review is partially correct but for the most is off-the-mark. A. D. Millington's book, "Complete Book of Mah-Jongg" is the ultimate authority on Classic Chinese mahjong. It is an elegant explanation of an intricate and arcane game. D. B. Prithard's book, "The New Mah Jong" is essentially a graphic codification of the Official Chinese rules of 1998. The two books are for two different set of rules; in this context any comparison is irrelevant. Prithard's book is dry but it is also concise and clear. At one time, it was the ONLY book to address the Official Chinese rules. Sadly, both books are unavailable in the United States.