I purchased this on the back of a Guardian Tech Weekly podcast (12 Apr 2013) in which the author was being interviewed. In this, it was suggested that this book may be a useful 'how to' tool. This is only true to a point in that it talks about the theoretical arguments around data journalism, but it is less an instruction manual than I believed it to be. This misunderstanding was compounded by the lack of internal book preview feature before the purchase. The final chapter does offer some broad observations on data journalism practices, but it's not sustained or detailed.
Nevertheless, this is a beautiful coffee-table book in the style of David McCandless' data visualisations, e.g. Information is Beautiful (New Edition)
. It contains many of the high profile visualisations that have graced the pages of guardian.co.uk in recent years). Just don't come to this expecting to learn techniques and you won't be disappointed.