User blog comment:SpartHawg948/An Open Letter Regarding Mass Effect: Deception/@comment-3973971-20120204205813/@comment-1153722-20120205101257

In every series, every form is released media is part of the canon, provided it doesn't completely contradict a higher tier of canon. The book's entire content is not in conflict with the established canon, only certain parts are. Therefore, the book itself is canon, but these contradictory parts are not.