This book started on a bad note, but ended in what is probably the best book on fasting that I have personally read. I think it's not perfect and I hope to read better books on the subject, but overall, still very good.
It started by making unsubstantiated claims, assumptions, unexplained premises, and a bit of pseudoscience. Not good. Let's start with the science. Franklin takes a very "science lite" approach to his explanation. Not bad in itself, but in essence he talks about fasting cleansing toxins from your body (provable), then describes all the toxic buildup in your body by food and its causes, and then even goes so far as saying if you fast you can reverse almost any ailment, even curb some of the effects of aging (not provable). The problem with that explanation is that it lets the definition of "toxin" be determined by the reader, and thus it ultimately seems like someone talking about "cooties" and how snake oil can treat your cooties. The science isn't really that important for the topic and can be forgiven. Heck it should have been cut from the book altogether, I think, except for a general caution to seek professional medical advice while fasting (which he definitely does). The opening chapter is probably the weakest out of the whole book, and it shouldn't be that way. When you are explaining something, you should really take your time and build a foundation for your argument, that way the person reading can follow your reasoning. He didn't really do that in the opening chapter. Instead he made claims about how fasting can cause miraculous things in your life, and then proceeds to innumerate all the miracles that will happen. Now, I believe in miracles, but as the foundational argument for fasting, I think it would be far more prudent to say that fasting is but one gateway to God's miraculous provision but still leave room for God's providence. It almost seemed like the author was saying all these things can and will happen, which seems irresponsible. He also made certain claims like "to get the thirty fold return, give; to get the sixty fold return, give and pray; to get the hundred fold return, give, pray, and fast." In that respect, meaning the return on giving explained in Mark chapter 4. I'm not offended by this, but there was no explanation. So why should I take his word for it? Again he makes other similar claims like "fasting is how you present your body as a 'living sacrifice', holy and acceptable to God" (as found in Romans 12). Again, no explanation, though it's an intriguing premise that I wished he expounded upon. My other gripe is that he totally sounds like someone within the Church of God or similar Pentecostal denomination--nothing wrong with that, but it just irks me, personally, and there are many quirks from that culture that he embodies.
Despite the poor start, the overall book was great! After that first chapter, he really changes gears. He obviously goes into the "what" of fasting: what fasting is, and all the details associated with it. And he gives great explanations there. But I think his greatest achievement here is that he successfully explains the "why" of fasting like I've never heard it before. The overall message that I took away was just how important fasting is, and just how serious and holy it is in God's eyes. And I think that's the most important message of all. Too many Christians dismiss fasting as unimportant. But Franklin goes on to describe the biblical precedent for it throughout the Old and New Testaments. But I think the best part of the book is that he goes into great detail about the effects of fasting. He mentioned many, many testimonies of people in his church who had tremendous breakthroughs and miracles during their annual time of corporate fasting and prayer, and that really impacted me.
Every Christian needs to be educated about fasting, because it's an essential spiritual discipline for every believer. And I think this is a great starting point for any believer.