Literary Review of Canada (http://www.lrc.reviewcanada.ca/) for November has Viv Nelles's very positive review of the first volume of Richard Gwyn's biography of John A. Macdonald. (Globe and Mail liked it too.) So far, it's only in the LRC print edition; they have not posted November stories online yet.
One of the things Nelles notes is the duty Gwyn felt to justify a new biography of Macdonald. The previous one is pretty substantial and is only, like, about 55 years old!
Later: LRC has put up the online November -- but without the Nelles article.