This is one of those academic style books, that has a variety of papers/articles, though it doesn't seem to be aimed at an academic audience. Being fairly academic myself, I appreciate the format because it enables me to get a variety of opinions and perspectives on this issue.
Of course, the majority of viewpoints seem to be starting from the worst-possible outcome as a result of disclosure and there doesn't seem to be terribly much attention paid to the middle-ground. I think that the ones who say that it's best to deal with disclosure on a one-on-one basis are probably right. The difference between 'hard' and 'soft' disclosure doesn't really make much sense to me, but I do agree that different degrees of disclosure are appropriate in differing settings and cases.
On the whole, this is a useful book, though it does tend to focus more on disclosure in situations where it becomes a necessity rather than a choice.