I have nothing against publishing a collage of blog posts into a book. But, you gotta be upfront about it, so that as a reader I make an informed choice on whether to buy and read it or not. I am not saying that blog posts are inferior to printed materials in anyway, they have their own structure, agenda and everything, more like a discussion initiator. From the description of the book, I got the impression that it was going to be a concise intro on spiritual and philosophic Jesuit thoughts, in the same way Jeyamohan had done it with 'Hindu Gnana Marabugal' book.
Rather, what do we have here is a hurried collection of his articles and a half a dozen responses he got from varied readers.