It is really an interesting book as it provides a dynamic map of how to walk toward Allah, and a number of stages, keys and facts to purify your character. The author 'Najmuddin Kubra' is called as 'Producer of Saints' and this book has a lot to confirm that. Though I'm not yet one of them even though I read the book :) I realised that even in purifying yourself there are no short-cuts, it is a long way with a lot of indications and symptoms of your developement. I enjoyed the book and it was easy to read and follow compared to other books of same topic. One thing that I clearly observed in this book is the dynamic nature of soul development and how much it motivates you when it is compared to just following religous rules in a static or routine way. We also need to diagnose our purifying practices all the time to be sure that we are improving, for example, he describes the dynamic nature of 'Thiker (rememberance)' as it is not always has the same effect on soul, the heart sometimes prefers that tongue shall be silent in order to focus and find the meaning of doing that. Anyway, I wish you enjoyable reading :)