Would you be kind enough to give a very short overview of this book, and maybe about the person who wrote it? Is it considered a 'central' textbook in this subject? Also to the brother who stated about getting 'Shariat o Tasawwuf'. Just a tiny overview please. I tried to find it on google. I got this: http://www.azharacademy.com/Scripts/...idproduct=1433 : I can't find the original, is this the same book or a different one?