Which one is good?

::)This is in continuance of my previous message in this group titled "Good books for Costing,DT & IDT".I've got very good responses regarding the books to be followed for the said subjects,I'm a bit confused regarding the book to be followed for the Costing paper.Although I know about Saxena & Vashist but many of the fellow student friends has recommended Sarvana Prasatha's book on Cost  Management.Since the said book is completly new to me please give the plus points of the book vis a vis the book by Saxena & Vashist.Moreover please do let me know how the book has explained the quantitative portion,which I've heard is not explained clearly in Saxena & Vashis's book.In short since I'm going for self study please recommended the book which will  help me for self study.I hope to get good suggestions from students like I recieved to my earlier message.