Do you know of a text--in English--whose treatment of the class number formula is based on the approach expounded by Zagier in sections II.8 and II.9 of the aforementioned book? Unfortunately, my command of the German language is not so good yet; furthermore, for some godforsaken reason Springer Verlag has not commissioned a translation into English of this notable book.

Let me thank you in advance for your replies and attentive consideration of this request of mine.