The only way to read those chapters is to buy the official translations, as the fan translation project has been dropped.
As for whether it's canon, it depends on what you define as canon. If you think that the anime is canon, then the manga is canon I guess. But if your definition of canon is "not breaking the source material", then it's not canon, just like some episodes of the anime, since there's a considerable number of changes in the manga that go against the novel canon.
I'm more than a little concerned at the moment that there won't be an English language version of Vol.5 of Progressive, since Yen Press somehow STILL haven't announced a release date for it even though Vol.4 came out in March.