Very interesting, well written and engaging book. Fisk's premise is that Christianity has been waylaid by 7 pseudo Christian teachings, 7 "rules", that threaten both the life of the Church and the salvation of those who believe the false teachings. Mysticism, Moralism, Pagmatism etc are each denounced as false forms of worship that Christians and Christian churches have fallen victim to.
Fisk's writing style is rather verbose and flowery at times, but he also often waxes memorably poetic. He weaves together phrasing from liturgical, pop culture/movie, credal and scriptural references in such a way that his point is made both by the literal meaning of the words he uses as well as by the reference from which he draws the phrase. He personifies each false doctrine, each "rule to be broken", such that the book almost becomes a hagiography of false saints as well as false teachings. His word-pictures are vivid and fun to read. The pages are peppered with vintage-y looking line drawings (think "steam punk" art) and the fonts get switched up and bolded regularly, serving to accent specific points as well as to make for a visually interesting read. I imagine some readers could find this "mash up" kind of style very distracting, but I found it refreshing (although certainly something which could be overdone).
I would recommend this for several audiences: for those readers looking for a better understanding of Christian theology and doctrine from a source that is anything but stuffy; for those feeling like most of the flavors of modern Christianity they've tasted have been bland, dry and under-nourishing; for those looking for a framework to defend their faith against worldly attacks and the attacks of un-Christian world-views; and for those traditional Christians who feel confused and sometimes overwhelmed by the diversity of unscriptural teachings, those looking for something to scribe out some solid ground. I enjoyed this book for all of those reasons and more.