My friend brought me this book from Pakistan, but I can't find it on line: "URDU Boal Chaal" by Qamar Ahmad Ali Khan. The explanations are in English. 

There are many books to learn Urdu written by Ahmad Ali Khan, check it out: http://www.ferozsons.com.pk/FerozsonsSearch.php?author=&publisher=&title=&isbn2=&find=author&search=qamar%20ahmad%20ali%20khan&series=&language=&pubdate=&pubdatevalue=&page=1

I've been having the same problem, but I've found that looking for stories written and posted online often helps. The vocabulary and expressions are often more simplified than a lot of the books available in Urdu. 

Well, I don't know about books. But check online and take lessons. And if you need any help you can ask. I'll be pleased.

Thank for your good advise. Shkria