I really like the book because it clearly details the science behind fasting and I'm always dipping in and out of those pages because the science stuff is what inspires my fasts (even more than the weightloss, cause I was losing weight successfully before I discovered fasting).
I'm doing 5:2, I've learnt lots of stuff from the website and on here. Apart from somewhat over-compensating on "eating" days (meaning weight loss is slow) it's going well, but I'm not being particularly rigorous about when I eat on my fast days, I'm just restricting to 500 cals and having most of them in the evening. Also I may not be fasting for 36 hours, perhaps more like 33 or something. Does that matter? Should I read the book?